I do like the Ruger's feature of the slide hold. I always saw that as a drawback on my 3AT, especially with no "loaded chamber" indicator. Someone early in this thread said there was no instruction manual but there is a PDF of full instructions if you follow the first link to the product information and specs.
Let's let some "pro's" test it and we'll get the reviews. Until then, I'll carry my 3ATin my pocket.