Has anyone had experience with these types of slings?

http://www.brownells.com/.aspx/pid=2...MONTANA_SLING#

Yeah I know this one isn't the original Montana Sling, but it's a good price and I like the hardware on it. I've been trying to find any information on these but I can't. I need a classic looking sling for my CZ 455 American, and figured this fit the bill.