I like both and am currently running a Magpul MS1 padded 2 point sling converted for 2 to 1 ability. I ran the VTAC 2 point sling for a number of years prior when running a 13-15" rail and stock fully out. Ran a 1 point with an older setup and the slay with the longer hand guard just didn't feel right with me. I wanted to experiment with a shorter rail for 1 point slings and felt that even with a 14.5" barrel and 12" hand guard, a 1 point sling stowed the weapon tight enough without burning my leg, same went for a 9" hand guard. Sure I lose the ability to use the sling to support the gun on the fly, but I'm often shooting within 50 meters when I'm using my carbine. If I had to shoot beyond 100 meters then I generally would take a support position or go prone. Of course, this is just me at my personal practice and what I have experienced at classes. It all varies in the end, I personally feel more secure switching shoulders with the 1 point than 2 point necklace method. The necklace method has all that weight around your neck and say whatever you say about it, but getting choked out by your sling is far easier because things can happen. I recognize that and still use the necklace method if I was running a 2 point regardless, just maintain the respected amount of awareness. etc etc