The wall is pretty solid. My mother-in-law's brother is a builder who's been doing all the work on their house. When he drilled the holes for the bracket there was definately some brick dust coming out. With six mounting screws (rawl-plugged, obviously), it felt rock solid.
Irritatingly, having spent the extra for the tilt bracket, they decided that they wanted it flat to the wall so we had to take the screen off and remove the tilt mechanism. Apart from that, it all went smoothly, the screen looks very cool indeed
. The control mechanism is a little bit unecessarily fiddly though, which has led to a couple of anguished phonecalls from my father-in-law
.