So this came in today and I've been playing with it for the past several minutes. As some of you may remember, I've owned the BDDI and PBDDI and I didn't like either of them. Well I like the RBI a lot better. To me it seems to sound different than the BDDI pedals. I'd say it sounds a little less constricted (still does sound a little constricted in my soundclips but not through my amp), less flabby, and I can get a sound out of it that isn't totally ice pick sounding (which is a problem I had with the BDDI). When the unit arrived it had all the knobs at 12 o'clock, and I cranked the drive, turned down the presence and treble, put the blend up all the way, and added a lot of mids. I set the RBI going into the power amp only of one of my ampeg heads, so the preamp on my ampeg is not used in these clips. To record the sound I mic'ed up the amp; I also tried recording direct out of the RBI and mic'ing seemed to capture the sound I was getting better, although far from perfectly. The sound I hear through my amp is a good deal more ballsy, raw, and less choked sounding than what you'll hear in these soundclips. Anyway, here's the clips, first with my Jazz Bass trying to cop a John Paul Jones Led Zeppelin thing: http://media.putfile.com/RBIJazz I think that sound works alright for that song, anyway. And here's with my SG Bass for more of a distorted grunt sound: http://media.putfile.com/RBISG That was a (not so good) attempt at some Gov't Mule. But it was pretty grunty anyway. Anyways, I'm definitely considering using this thing live in place of the preamp on my amp, so if you have any opinion on these tones whatsoever I would appreciate if you'd share it.