I dig my Witness, but it does not get carried except in the woods. It's reliability is not 100% due to feeding issues. It's a fullsized model. I've put in new mag springs and done the fluff and buff on all but the extractor. Looks like I need to work over the extractor.
I really like it's ergonimics and it is a darn accurate gun.
You might want to look into a Dan Wesson Bobtail commander for concealed carry. Expensive, yeah a bit, but I also read of the same issues with those pistols. Maybe a Glock 29 will fit your bill after all. However, for 10mm, you'll probably turn into a reloader if you're not one already. If you can find your brass that is.
And Glock chambers are generous, you may want a new barrel so you can shoot lead as a reloader, and it'll be easier on your brass too. For those prices, I think you're into your 10mm 1911 style pistol. Plus, handle the Glock first, the grip angle just doesn't work for some people. I'm considering one, but need to check the grip angle first.
I'd suggest you visit 10mmtalk.com and dig a little. Search under Witness and my handle and you should find quite a bit of info. Folks over there are just as helpful as they are here, but all topics are 10mm specific there, so you'll find more depth with less diggin IMO.