Because 2 days after I got it I got the new BassPlayer Magazine and saw an ad for the Little Mark Rocker 500! So had to upgrade. And i have to say, I love it. It has all the tonal range the Little Mark III had with the nastiest tube overdrive fuzz I've ever heard!!! You do lose the balanced input, but I dont even own an acoustic bass so not a big deal. The only complaint I have is that theres no footswitch. It'd be really nice to go from clean to overdrive without having to turn a knob, kinda shocked they didnt provide for this. Have to say I'm totally in love with my gear now. The down side, with my 08 EBMM Sterling, the MarkBass Little Mark Rocker 500 and MarkBass 104 Cab; I really have no more excuses. If I suck, it's purely because I suck, can't blame my gear at all now...