I have the STI BLS (x2), in 9mm, and am very pleased. However.
It is a 9mm on the 1911 basic frame. Two OTB things to watch for:
1) The BLS uses a dual spring recoil system that (initially) is stout.
2) I had numerous failures to feed, that I was able to track down to #1, and to a "snug" chamber. There were no visible imperfections, however, while hand-cycling the pistol, the cartridges would all snag at the same point, feeding into the chamber. I used a Dremel, felt bob, and a slurry of #120 grit AlOx and cutting oil, followed by 600 grit fine lapping compound to get a finish that is blinding, with a bore-light.
#1 I solved by leaving the slide locked back, in the case for a week. :biggrin:
I've had no problems since, but I want 300 through each gun, in one session, with no probs, before they're "certified".