Got this in the mail today and had the opportunity to try it out just a great hours later. It worked great. It's easy to use and my son was willing to wear it both ways so I consider that a plus! I do like that you have the option to lock the buckles. My son can't undo them yet but I know that could be an insurance in the future. The spring cord is pretty awesome. In the past we have just had a leash type thing and I hated it because the slack would drag or become and tripping issue. I also like that the harness has padding, it seemed comfortable and my son didn't complain in it so that's another plus.