Stable, and more for 50 "plasma TV. Very good!

For Packing / Contents:
Normal box, inside, all components well secured with foil against scratching.
Manual is in English, but you do not need and if there are explanatory images.
To assemble all types of screws are present, you need to be mounted on the wall and on TV.
The dowels are indeed adequate but not of very good quality. But since they are sufficient, I draw from any point.

Holder:
Material is very stable and has equal weight. During installation you should work at the start with two people, which makes it a little easier.
The presence on the base plate Mini spirit level, is even pretty much has surprised me.

Should the base not even be right away in the Lot, the carrier may, at which the TV is appropriate to be twisted.

The bracket on the TV are screwed separately on TV to be easily hooked onto the rails of the bracket on the rail then can the TV be moved Solte to do at second, because the holders sit quite firmly on the rail.

For mobility:
The bracket is very stable and has no problems or no weaknesses with my 50 "plasma.
Prior to installation you should lubricate the joints a little, otherwise you have to later apply some pressure during the adjustment.

Conclusion:
Stable mount with all accessories, also for different devices, has a 50 "TV no problems.
Very good workmanship for a reasonable price, with many adjustment possibilities.
At times, you should be in pairs during installation.
VERY GOOD!

EDIT: Replace anchor against a branded product. Holder has eased with me because of defective plugs.