First, let me say that CQB Solutions has the best customer service I've ever dealt with. I talked directly with the owner of the company, and he personally handled my order. Nice guy.
The SOP sling is great. I didn't find it getting tangled at all (LBE), and it was worth every penny. The nylon is especially soft. Before, I'd been using a USGI sling, and simply strapping the rifle across my chest. Not too bad of a rig, for free, but the SOP sling is just so much better. I especially like the cross-shoulder transition feature, I couldn't do that with my old rig. The only problem with this is that the main strap is too big for me, unless adjusted all the way. But, it works perfectly there. You guys are a lot bigger than I am - it would probably fit most of you well. I highly recommend the sling. I don't have an ERB on mine, so I don't know how well those work.
As for Santa Barbara SS109: I'd stay away. In roughly 450 rounds, EladEflow and I experienced five stuck cases, in two different rifles. Three occurred in mine, two in his. Lots more ammo was shot out of mine, so that explains why. The chambers were also cleaned well after the first stuck case occurred, so it wasn't that. We later found that the extractor was ripping the rims, and that the rear of the cases (near the head) were being bulged - enough to feel and see. Steer clear of this ammo, unless you like jams. The upside is that cleaning was pretty easy.
Pics should be up tomorrow.