shooter521
Certified Glock Nut
No, this isn't a comparison) but I've had a great experience and I've read nothing but positive reviews.
The last real problems we had with Oly date back to when they used cast receivers in the Plinkers; we had a couple of them come back literally in pieces, and several others that had some serious slop between upper and lower (as in, 1/16" or more of space on either side of the front lug). Since the debut of the Plinker Plus which uses forged receivers, we have had no issues that couldn't be fixed in-house (most common being improperly staked gas keys, and use of the rifle extractor spring and buffer in carbine systems; phenomena which are also common with Bushmaster, DPMS and others). I still don't understand why they mount their castle nuts backwards, though.