I checked around Amazon as well as some other sites, and decided these were what I needed.  I read the reviews, looked at the pictures and bought two of these.  I received them today.  I unpacked one of them, read the instructions and immediately filled out the return request for Amazon.  These mounts are very, very heavy and require 6, yes SIX, screws to mount to the wall.  Are you kidding me?  The TVs are only 22 lbs!  Two screws in the studs and then more damage to the wall than is necessary.  What a joke!  And Lag bolts?  Ever heard of screws?  The other issue is that these are very hard to move.  I bought an articulating wall mount for a reason, and I expect them to be able to move without a wrench in my hand.