I couldnt find anything on the internet pertaining to real-time usage, HOWEVER alot of folks were asking questions. Heres my 2cents, I just bought one. THE GOOD - Its small and its light - It fits in my Vette. It handles vintage Fender basses, active boutiques and my Tbirds without missing a beat. Note - I did not use a 5er only 4 bangers. Its very well made. IF used with a 1x15 cab (8 ohm) this amp CRANKS. Both my guitar players use 100 watt combos and the amp cut. The vol was set to 6-7, the drive was set to 6 and everything else remained flat. Cut clear tone w/no muddiness. Keep in mind this is not a TC unit or a boutique amp that costs 1500.00 - at this price point this amp is a bargain. Using the unit stand alone as a practice amp, it does the trick. THE BAD - With the band, the unit stand alone is useless. It doesnt cut and it sounds very thin with NO booty. Basically it was totally lost. Dont plan on using it stand alone if you want to use it at a "practical volume" practice. HOWEVER once you plug in the ext cab, this amp REALLY wakes up and comes alive. Bottom line - This was a well worth while investment. Your basses will sound very good. For a practice or small club rig (combo and EXT) you'll be ok. I bet this will sound ok w/an URB (Ihaven't done this yet) AND it fits in almost any vehicle. The combo stand alone i'd give 2.75 of 5 stars with a band situation or 3.5 stars as a practice amp. WITH the ext, given the price point - its an ez 4.0. The amp does have a HIGH quality feel to it and a very classic, classy look. What are my dislikes not mentioned? - Its a nit pick but the power cord attaches to the face of the amp and its a touch annoying. But I guess when you're dealing with size and pricepoint (more price point than size), comprimises must be made.