I have two Blue Force Gear Vickers Slings. One is padded, the other is not. Kinda like the not padded one more. They are well constructed and hold up. The adjustment buckle glides really well and it's very fast to loosen and cinch. I also have a Proctor sling. I'm still using it, but haven't decided if I like it or not. It is definitely a minimalist sling, and not needing additional mounting hardware is nice. It's also super lightweight and thin. The adjustment isn't as smooth as the Vickers Sling though.
We have Magpul MS3 slings on all the pool rifles. I don't like them, but YMMV. They seem too "clunky" if that makes sense. I'm sure it's because they're 1 or 2 point adjustable. We have them on the pool guns, because some people absolutely refuse to see the 2 point light.