I got a deal on mine from a friend that had to thin the herd, so I gave it a try. I like it. I havn't had any real issues, charging handle sticks a little but its getting better. Overall I'm happy with mine.
Is it really sticking, or is it just hard to charge? Remember that you are unlocking the action in the first part of the motion and then pulling against the recoil spring.
If it is sticking, lightly coat the inside of the charging handle tube with white lithium grease. I've heard it helps substantially, although I've never tried it.