This is by far one of the best amp modeler / multi-effects I've ever played. I've used with a solid state combo via stereo line-in (bypassing the preamp), and using the 4CM into a Mesa Boogie MV.25 and custom 2x12 cabinet. It's great either way, but the GT's amp sims are so good I almost prefer it direct without all the cables. In the 4CM I use the Boogie's preamp for distortion rhythm and screaming leads, and the GT's preamp for clean and crunch/TS9 tones - basically a 4 channel setup including JCM cleans all through a tube power amp. It's a Boss so you know the effects are top notch with deep editing capabilities, and the delays and reverb are just sweet!! The amp sims are really cool in that they have Sag and Resonance settings that allow you to adjust the touch sensitivity to the point where sometimes I'm just shaking my head in amazement! Very important: Download the Boss Tone Studio app, watch a video or two, and then you'll be amazed at how easy it is to edit patches on a PC. It's really fun, and you can even try Tone Studio out before buying a GT. Be forewarned though as you might yourself spending a lot of time tweaking the settings just for the heck of it. :) Although I've heard some people gripe about the buttons being a little close together, it's not a problem for me but your YMMV. Personally, I'd rather have it that way than a bigger form factor and more weight. Lastly, the colored LED switches are very handy, and it's a Boss and built like a tank. I'm seriously looking forward to using the GT-1000 as my go-to practice or performance hub for years to come. To that end I ordered the official Boss ME-80 case and it fits like a glove! For reference, I own a lot of Roland, Boss, and other high-end gear, have played for over 30 years, and have had a Boss GT-10 since they were released (Shhh... the GT-1000 is much, much years better!). Keep on playing!