Boss's FDR-1 is an amp modeler with reverb and vibrato, based on the Fender 1965-era Deluxe Reverb, which is a coveted tube amp known for its distinctive tone. Apparently BOSS worked with Fender to try and nail the sound of the Deluxe Reverb, which increased my expectations for it.
The FDR-1 is packaged in the standard BOSS stompbox casing, which are always pretty sturdy. It would blend in like a regular stompbox on your pedalboard. It has your standard 1/4" input and output, and ac adapter input.

The controls on the FDR-1 are very similar to the actual amp it seeks to emulate. It has Level, Gain, Treble, Bass, Vibrato and Reverb. Other than to full understand how to tweak the vibrato effect, its very self-explanatory and I didn't even need the manual.

As far as the amp model, it is fairly good. I have played modelers that attempted a Deluxe Reverb sound like Line6 and Digitech. This pedal comes a LOT closer to replicating actual Fender sound than any other modeler I've heard. Its got sparkle, spank, and even grit that get pretty darn close to the real thing, without actually BEING the real thing.

As far as reverb, its good. Probably as good or better as the reverb on many amps people will plug this into. Sadly its not nearly as good as ACTUAL Deluxe Reverb reverb. It starts getting cheesy sounding in the upper range, so getting super drippy reverb like you can from the actual amp is not a reasonable expoectation to have. I still can't fault it much though.

The vibrato is great, very usable, and gives a fairly wide range of tweaking possible. I wasn't disapointed.

I played this stompbox by putting it in front of my low end tube amp; an Epiphone Valve Special. It added a new dimension to the already decent clean sound, so I can't imagine the miracles this pedal could work for a lackluster Solid State amp's clean channel. I was also able to use it to push my tube amp into a bit more grit and sustain. They interacted nicely.

The POD Pro is basically the same amp modeling technology and effects contained in the POD unit but contained in a rackmount unit with actual knobs so editing presets on the fly is much easier. It has the capability to be controlled by a floor footswitch, though I never forked out the money for it and I don't play out so I don't require that kind of control.

On the rear of the unit it has stereo outputs to go to power amp, footswitch jack, effects loop input and output, and a single guitar input on the front.

Its pretty sharp looking, sitting in a rack all lit up.

Editing the presets is super easy, its as simple as twirling knobs to dial in the desired amp model, gain, eq, and effects. Fine tuning the paremeters on some of the effects would probably require the foot controller but the stock settings aren't bad and satisfied me. I actually did read the manual which is unusual for me, it was very informative and saved me some time tinkering with it.

I played a couple of humbucker equipped Les Paul style guitars through it, while running it into a samson 120 watt power amp, then into a crate 2x12 combo amp I turned into a speaker cab.

The amp models are the typical Line 6 stuff, sometimes you are suprised at how close they get capturing the "essence" of a particular tube amps sound like the Dual and Triple Rectifier models, but since modeling technology is not quite capable of emulating the dynamics and behaviour of tube amps- some models don't stand up to the amps they seek to imitate at all. I LIKED the sound of the "blackface" model but it doesn't actually sound like a Fender.
If you are into heavy riffing, you will LOVE the "Insane" model. Think of a Boss metal zone morphed with a typical Marshall hi gain sound, and there you go.

The effects are quite good, not as good as the Flextone III I had owned previous but the POD Pro was of an older generation so it shows Line 6 is contantly improving their products. Playing in true stereo makes a real difference here though, the effects don't come alive nearly as much otherwise.

This is an analog, single-channel amp simulator in a pedal. Apart from the basic (self-explicit) Level, High, Low and Drive controls, you have three 3-position switches to help you shape your tone:
- Amp: determines which kind of amp will be emulated. Possibilities include Tweed (Fender), British (Marshall-ish sounds) and California (for Mesa-esque tones).
- Mod: choose between Clean, Hi-Gain and Hot Rod.
- Mic: Since this pedal includes a cab simulation, you can choose how your virtual mic would be placed, choose between Classic, Center (close miking at the center of the loudspeaker) or Off-axis (close miking once again but this time with the mic at the edge of the speakercone).

Beware: contrarily to the GT2's celebrated predecessor, the Sansamp Classic (or the original SansAmp for, the lucky -few- ones who have one) the cab sim on this model can NOT de deactivated: the GT2 was NOT designed as a "normal" distortion box, but aimed at being plugged directly in a mixing board/recorder/soundcard (NOT an amp), as a sort of DI box --which by the way makes it all the more a shame that no XLR output is provided in addition to the 1/4 jack, doesn't it?
With the poweramp stage and the cab being emulated, an effect loop (even one with an insert like on Marshall's original Guv'nor) also would have been welcome...

The manual is clear, yet it will take you a little while to get through all the possible configurations, but everything is rather simple to understand... And if you just can't, well, consider yourself lucky not to have spent more in a real amp.

I can hardly compare these simulations with the original amps but they all sound good to me. I use it with a Mexican Fender Fat Strat and occasionally with a cheap mic (but the GT2 can be used with a bass too).

I don't like the British (Marshall) settings too much as it's a bit too much in the high-mids, but the Celifornia (Mesa) mode is perfect in my opinion as far as distortion is concerned. Both provide powerful sounds although none tend to range on the modern side (it's OK to play ACDC, Guns N' Roses, Nirvana or early Metallica, but don't expect modern heavy or nü metal sounds). Oh, and by the way, turn your guitar's volume knob WAY down if you expect any clean sound from either of these two modes -- even with single coils...
The Tweed (Fender) emulation is in my opinion one of the strongest points in this unit. Not only does it give a great clean sound, but it also reacts surprisingly well to virtually any distortion pedal placed ahead of it (I tried with a Big Muff, a Boss DF-2, a cheap Belcat OD, a Metal Muff and a Zoom Tri-Metal), which can make up for the lack of a second channel.
The cab sims sound average to good, sometimes a bit muddy, but at least from one setting to another you definitely can hear a difference.

The GT2 does respect the dynamics in your sound and contrarily to many other amp simulators its organic sound WILL give you the sensations that you'd feel playing on a REAL amp -- even if you play it with headphones!!! In high-gain settings there tends to be a certain hiss but a good noise reducer (ISP's Decimator for instance) will do the trick.