I've handled a few, and think they're ok. At the moment, I just really dont have a need for one, and dont have the money for the one I want, since I would want a dedicated frame for it with a higher capacity than a single-stack 1911.
I have two .45 carbines already (1927 thompsons). I dont want one for my G19 because I have a 9mm carbine (AR15).
I wouldn't mind having one in 10mm, but I'd have to build a Para lower for it, or buy a G20 just to take the slide off of it. I'd probably wind up building a Para lower for it, since the .45/10mm glock frames feel frigging huge to me.