I got interested in trying one of these out and yesterday I headed down to the local Guitar Center with my jazz bass in hand. The salesman sets me up and plugs into a SVT Pro (VI?) and Ampeg 4x10 cabinet. Let me confess from the beginning that I am only interested in the amp/cabinet modeling. I don't use effects. Let me also confess something that will become abundantly clear as I go on and that is that I am an absolute zero when it comes to anything remotely technical. I really don't know how anything works - phones, computers, amps, etc. Anyhoo I had a ball trying out the different amp/cab models. I spent the most time with the Acoustic 360 which sounded very much like I remember it. I was a little disappointed that they didn't figure out a way that the controls could be exactly what they were on the amp being mimic'd but I sure they had their reasons. I was truly surprised at how much I liked the Dual Showman. I had one of these back in the day and though I recall it having a nice tone I don't recall it have THAT nice a tone. I thoroughly enjoyed the Bassman Tweed and the Vox 100 was kind of fun too. I was not too impressed w/the Fliptop. That was surprising given their current state of mystique but perhaps not so much so because I had one back in the day and don't recall ever thinking it was such a good amp. Maybe its the kind of amp that just sounds better in a group rather than solo'd. Anyway, I know that there are more than a couple of users and I have some questions. 1. Has anybody (other than Line 6) bothered to compare these models with the real thing? We (the salesman and I) did plug an SVT into the same 4x10 cab and compared them. To my ears, the model w/ supposedly the same settings on the SVT sounded deeper. 2. Does anybody know how Line 6 tested these models and/or if the results of these test are available? 3. I'm seriously considering buying one of these but as I stated above I'm a zero when it comes to technical things. And as I said, I'd only be interested in the amp/cab stuff. Is there a good (less expensive) alternative? 4. Another thing that has me concerned about it is the ease of switching between amps/cab settings. I can't imagine using more than 3-4 different pairings. I've seen a lot of discussion here about saving settings, etc. downloading tones, etc. and that all sounds way beyond me. Can you just reach over and switch from amp/cab ____ to amp/cab ____ and adjust tone, bass, etc. to your liking? Any help or comments is appreciated.