I have one and have been very pleased. I particularly like it with my fretless. The added mid-range cone seems to help the "singing" quality I like. Played the fretless and MB12 with a soft handed jazz drummer, keys, and a vocal trio and the Carvin was a great fit. It's really not enough amp for a rock or guitar band without an extension cab. I have used a Schroeder 15L under it, but I almost always switch to my Streamliner and bigger cabinets if I need more oomph. To my ears, the MB12 lives on the modern side of the sound fence and is more clean than coloring. It has more mid-bottom punch than I expected, and stays pretty "b-string" solid at reasonable volumes. For small or acoustic gigs, or when I need a very small rig, the Carvin's really wide tone shaping ability, ample connections, decent compression, and quality workmanship have been well worth the very reasonable price (IMHO...of course
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