This is a very sturdy and beefy sling. There isn't much stretch to the bungee, just enough to minimize snags and to provide a bit of give when using. The sling allows for quick transition between strong and weak shoulder firing stances. I use this on my TM MP5-SD and it works great! The buckle allows you to detach your weapon when in the rear to relax. The addition of another quick release on the sling would allow for quick removal/donning, especially when sized for a smaller person.
Beefy metal fittings
Quick release buckle
Two types of connectors
Could get a bit smaller.
Possible addition of quick release on sling
Bungee a little long, weapon doesn't sit close to the body
These cons do not detract from the over all effectiveness. Just some suggested improvements. Still a 5 out of 5 product.