I selected the Sanus Vmaa18 because I wanted to be able to face my 42in plasma 45 deg left or right in addition to straignt on. I also wanted easy access to the rear connnectors. In addition, I wanted to minimize the distance between the TV and the wall when the cantilever mount was full retracted.
I researched all the major manufaturers of cantilever mounts and decided on the Sanus Vmaa18. The minimum thickness is under 4 inches (some are over 6). The 18in swing was about right for allowing +/- 45 degrees of swing with a 42in plasma.
The unit is very well built and comes with a wide array of screw sizes. After I found the right set for my TV there was a big pile of assorted screws and cable management fasteners left over. There wre so many that at first I thought I must have forgotten to use some of the screws. Then I realized they were intended for other brands and model TVs. I'm saving them in case I ever need to mount a different TV onto the same wall mount.
I thought the printed instructions were reasonably good, but I'm mechanically talented. If you have experience with "some assembly required" products, you should be OK. Assembly mistakes are fully reversable so the worst thing that can happen is having to take it apart and start over.
On my TV I had a lot of discretion as to where the horizontal mounting bars crossed the back of the TV. If you're not careful you can block some of the A/V input connectors. I took it apart and put it back together twice before I got it just right.
At first I had a little trouble deciding where exacly to mount the wall plate. It is not necessarily centered behind the TV. I found no guidance on this in the instructions. What I ended up doing was to stand the TV up on the floor and mount the entire apparatus onto the back of the TV (you have to do this anyway). This enabled me to hold the wall plate in place and measure its position relative to the outside edges of the TV. Since I knew exactly where I wanted the TV positioned, determining the wall plate location was easy.
The cantilever bracket can slide several inches left or right on the wall plate, so precise horizontal positioning is a simple "final" adjustment. However, there is no easy way to tweak the vertical position of the cantilever, so the vertical position of the wall plate needs to be set perfectly.
I mounted mine on a brick wall, which some professionals refuse to do. It's difficult to firmly anchor a screw into brick, and having 80 lbs of TV extended a full 19in away from a brick wall requires some really good fasteners. I appreciated that the wall plate had lots of places for bolts. I was able to install 8 self-threading anchor screws across the top of the plate. I'm not sure I really needed that many, but why not use all the holes? It may be overkill, but I'm very confident that it will never come loose, and that's worth something.
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