I had several (gig rack 600's) as rentals. We used them for speaking engagements, seminars and that type of stuff. They just weren't loud enough or had a flexible enough eq for music. Although I did use them for low volume rehearsals once in a while. However, they were reliable and did work great for what we used them for. I hated the case they were in. They seemed like a good idea at first but they proved to be difficult to use, the rounded off and smooth plastic case would slide around if you didn't put the supplied rubber mat down. Of course the rubber mats would always get lostl. You couldn't stack anything on them either because of the weird shape. We took them out of their original cases and mounted them in 4 space shallow rack units which worked much better.