I've had a Vickers two point in some form or fashion since 2010. They are rock solid. The quick adjust is intuitive and easy to get used to. Practice "swimming" into and out of the sling so you can switch sides, go prone, carry at high ready, etc. The $50 you will spend on one is nothing compared to the cost of the AR, ammo, mags, and accessories. If you plan to wear a chest rig or some kind of body armor I would not get the padded one. If you think you might carry it for a long period of time without those things then the padded one might be a better choice. My preference is to run two QD swivels, with the one on the forearm just forward of the receiver.
EDIT: for clarity