Yep. I've had two for 3 years now. We've started getting some bigger outdoor gigs and my band would prefer to keep the setup simple (no subs, so no PA support for me). Last year I found myself pushing the two of them further than I wanted, so I added a 3rd when the opportunity came up.
Three of them are A LOT louder than two of them. Although I was pushing more wattage than usual, I had the master on this particular amp at like 9:00ish rather than 12:00ish...outdoors, in a tent, with a ton of people. At one point the bass was overpowering everybody else so I had to turn it down just to keep the mix decent.
I can't wait to do our beer garden gigs with all three of them. They want rock concert volume levels. We start out LOUD and the manager keeps coming up and telling us to turn up. Without a full blown line array I'm not sure we'll get to the volume he wants, but this should do much better regardless.