I've seen them but have not tried them - don't see why they would be more of a risk for snagging then the free loop - I'd think even less so. They completely eliminate the concern about the loop getting caught under the skirt which is a real danger. I think there was a recent incident (death) that may have been due to that. I know it happened once to me when I was just starting - could have been bad if it wasn't such a crappy skirt that was easy to pop off. I'd definitely try the new loop next time I need a skirt - I don't see any negatives to it. I just wonder why it took so long for someone to come up with it.
I have had some work done by Skirtworks - they are great people to work with. I recommend them highly!!