I have a V412T with Eminence built BR12s. They sound good as long as you feed 'em plenty of mids, but try to scoop 'em out and they get an annoying honky tone to them. Granted, I'm not that big of a fan of scooping things out, but I was in a band for awhile with a bunch of guys that were that insistent I did.
Overall, though, I prefer other speakers. Because even when they're getting the mids they like, they're good, but not great. But the cab itself is gtg. It's made out of 3/4" Birch plywood and built like a tank, but heavy as f#$%. That said, I'm selling mine to another player locally because I've scored a couple deals lately on cabs I like better than the Carvin.