I have had one, and some how it walked off from my loading station one afternoon. I have a good idea where it walked off too, but that's besides the point. The short time I did use it, I liked it.
http://www.cabelas.com/cabelas/en/templates/product/standard-item.jsp?_
I bought mine at Cabela's and it worked great. I especially liked them when loading XTP's. It worked flawless.