Gig? No. But I did use one once in a private improv session with a drummer, and was impressed mostly with its tone, but somewhat with its output as well. And I am by no means an Ampeg guy...
Still, it didn't have nearly the output that I really wanted. The only way I would even consider using one in a gig would be: 1) in a small space, at low volume; or 2) with a high-quality microphone right in front of it, feeding to the PA (DI too).
MM