I bought one when they were first released, over the years I have used it as on stage fold back with the di running to the PA, as a mini PA for mini gigs at friends houses and I once used a pair of them connected with a small pa desk to create a mini PA system for an acoustic open mic event, when I first got it I compared it to a friend's as80 and the sound quality was very close, he was very impressed.
For the money I think they're great, I actually havent used mine for a while but couldn't bring myself to sell it so it's on long term loan to my best friend and bandmates as he's got a bit more storage space.
Matt