I used this mount to put my 50" plasma above my fireplace.  It was actually very easy to install... just follow the directions.  Adjustability was good.  The only small thing I had an issue with was that I found the screws that are used to tighten the TV to an arbitrary viewing angle a little tricky to use, and I really had to crank them down to get them to lock the screen at an up-angle (to install the HDMI and other Video cables.  Overall, once the cables were installed and the TV was put back in a down-angle viewing position, all was good.  I would recommend this product for the sturdy nature of the components, the ease of installation, and the price.

One small trick I learned... I installed the TV to the wall first, and the cables second.  I just used a hand-held mirror behind the TV to insert the cables properly.  Probably what everyone does, but I've never read that in a review before so I thought I might help out any other first-timers.