I just recently quit a band that was using 2 Bose PAS systems to amplify the whole band. It was a......., uhm....polka/variety band. I actually like polkas very much, but that's niether here nor there. 2 horns, accordion, drums (me), and electric bass. The systems worked OK for the smaller places we played. It worked OK at the outside gigs too. Just don't expect it to give you a "massive" sound. Very clear, though. The subs for the PAS systems sound surprisingly good---ON STAGE. The bass response dwindled to NOTHING any further than a few feet from the units themselves.
In terms of portablility, you can't beat it. Set-up times are very quick, although we did have to sub-mix to get all the vocal mics and horn mics in, as the units only have 2 mic inputs each. Would have been quicker if everyone had their own unit and didn't have to sub-mix, but at $2K a peice, WHEW!
It was my suggestion to get the Bose, because I was tired of hauling/loading/setting up their crappy Fender 3-way system. Would I buy one again? Maybe-- if I was doing a solo act.
When I left the band, they bought me out of my share of the Bose. They are still using them and seem to be pleased.