The gear works fine at it's intended price point. Just be realistic about your expectations and don't let a bunch of sound engineers polute your head. Sound engineers will start complaing about preamps, EQ, filters, blah, blah, blah. I for one hate Carvin's 60mm faders but... The truth is for small club gigs, small out door gigs and practice 99% of who is listening is not going to know anything about that stuff or even care that the EQ isn't perfect or that frequency response of your (insert any guitar store brand here) speakers is flat at 250KHz. If the Carvin gear spec and features fit your budget go for it.
The Carvin gear will work reliably as long as you are not beating it up. It's not the best sounding gear by a long shot (IMHO) but I have used their gear with reasonable success. Nobody complained about the sound quality but me.
That being said I do they they make solid power amps and they are priced at very reasonable levels.