Simple clean strong design. I've used these for anchors many times. The major problem with these is that if the rock bulges at all in the plane between them, the rope can 'pinch' and be harder to retrieve when pulling. Overall- I recommend these along with Clip Safes.

Mountain Tools' "Clip-Safe" hanger is the ideal low profile crux-hanger ready for lowering off or paired and camouflaged up to make for a low profile anchor system. Compare them to the Fixe ring anchor and Metolius Rap anchor. These being .40 cents more than Fixe Rings. But you won't get the same rope pinching effect you get with the Fixe rings in certain positions, and moreover you'll save on the total weight. If I'm not mistaken they have a larger radius where the rope rests compared to the Metolius rap anchor and are comparatively cheaper too by .65 cents. However, all the systems will need either to be pulled entirely or cut to replace the wear points.

Updated: have now place these and the lower off was without issue. Compare the cost savings of a 3/8" screwgate plus metolius hanger to these bad boys. In either case the weight savings tips any even balance.