Well I've been and tried it out with my own Charvel Self-Built guitar (in signature), and I don't know if it was the demo booth acoustics that let it down, but I struggled to get inspired. The booth was quite small (couldn't get more that and I had to sit on the floor with the amp to get a clearer listen to the actual tone. Sat on the stool, the amp was almost right by my ankles. The range of gain levels was impressive, but the lead channel basically sounded like the same amp on different gain settings. I know this sounds stupid, but the JVM is advertised as being a range Marshall amps in one box. One thing I did notice was that the Lead channel (on this particular amp) was a fair bit woolier than the clean channel, not as sparkly. I tried to EQ but it seemed to drift over into harsh territory. And the lead channel red still didn't chug in the way I wanted it to (I am part metal head). The speaker may not be helping in these aspects too. It is the only Marshall amp utilising the Celestion 8 Ohm G12B-150 (which incidentally, after playing for about 20 mins, I noticed was connected to the 4 Ohm speaker jack!). I already have a spare one of these that came out of my 1912 cab, so this was the first time I have gotten to hear it used in anger. Is the G12B a bass speaker (as some have claimed, Frequency Range - 60-4000Hz) as the 215 was quite rumbly and could probably do with a different speaker installed. Overall impression: The demo booth was too small for an honest appraisal of the 215. I couldn't get more than 2 feet away from the amp. I was wondering if my 1912 would be a good pairing with the 215 if I reinstalled the G12B, but now I am thinking that would compound the wool and rumble issues I had with the tone. I have a 60W G12 Century Vintage that I could try in the 215 (I only play at home so no worries about that) to see if that fixes the wooliness of the lead channels (and slim off 7 lbs). Or even a G12T-100 (which I do like!). The bottom line is that I cannot afford to buy this amp outright (£499), some downsizing will have to occur (DSL40CR, VS65R, Metal Zone, BOSS DR-880, Roland A500PRO keyboard, ZOOM A2 effects, Pocket POD), and at trade-in prices, still have to top up the balance. I have downsized before and been left wondering if it was worth it. I would be taking a punt at the tones opening up in a larger space (but still not that large!). But I do think it would sound far better out of that demo booth (and in my Man-Cave). I think the stock speaker has to go. That would leave me with a pair of G12Bs that could be future goers in an open backed 212 cab? But would I just be swapping apples for apples. I am happy with my DSL40CR setup. But this JVM seems to have been sent to taunt me. But with a bit of tinkering and it could be my amp-for-life! Arghhhhhh! Will think on it. Cheers for all your advice guys.