I picked up a MagPul MS1 and tried the different connections (clips, QD) for an AR. Intent/need was for a good sling for a run-and-gun event but also general use. I really like it, simple and efficient, good quality. Far and above anything else I have used on an AR and that got me to thinking about my bolt gun slings. I have a few leather and nylon slings for my bolt guns but I am going to get the MS1 due to fast, easy, and strong/secure adjustment with that "slider." I will also look harder at the RLS.
Slings, like most everything, come down to personal preference, need/want, comfort for YOU so I say try a few, maybe borrow buddies slings?