I put a bunch of rounds through ones at Wilson's when we were up there, and I have shifted the ETM's I got into the "take it to the range bag." To date, they've worked exactly as billed in half-a-dozen 1911s, from the Rock Island cheapie to the C&S full-house custom. In truth this hellish December has put a crimp in my range time. I've talked to several "gunnies" about them, and all report 100% percent.
My intent is to replace my current .45 1911 magazine "stash" to all new ETMs by the end of 2008...
Michael B