Best bang for the buck ever!
After reading all the great reviews about the Cube-80GX, and having had a good experiences with the Bass 20 XL and Cube 20 XL, it was time to take the plunge.
In a word - AWESOME! I'm a tone aficionado and over the years have had mixed experiences with SS amp models replicating overdrive or distortion tones, but this one really comes close. It only took me 5 minutes to find an overdriven British sound I liked, and a solo tone that is both scorching and smooth. Of course the clean channel is perfect, and the effects are unexpectedly good.
Definitely get the footswitch because it's so handy, and combined with the great tone, achievable volume, portability and direct capabilities, this is a perfect grab-and-go gigging amp.
I've saved the best for last, and the biggest surprise from this little amp is that it actually takes pedals very well, although you don't really need them. I wanted a little more smooth sizzle to my OD model, so tried both a modified TS9 and SD-1 in front of the amp. I was blown away at how close to a tube amp it sounded! OD pedals over the clean channel also sound great, but of course run all pedal output levels at unity so that you don't clip the SS preamp (unless you want to).
Finally, does it sound exactly like a $5,000 tube amp and a $2,500 rack of effects? No, but it comes close, and unlike many tube amps you can actually turn it down to bedroom levels. Considering it's more than fair price and all the other benefits, you really can't go wrong with the Cube-80GX.
Giving it a 4.5 because I've only owned it a few months and can't answer the question on longevity; if it's like other Roland products, it should stand the test of time.