Great bit of kit. Feels substantial and when installed feels very solid indeed. I use this for a 37 inch Sony Bravia and it feels very substantial. I installed this so my TV could be in the corner of the room and it works just as you'd hope.
If you're planning on a corner installation then I recommend doing a mock up at floor level to check that you can get the range of movement you need. If you don't then you might find that, when angled at 45 degrees, you can see the front of the wall plate in front of your telly - or you might not be able to get the TV tight against both walls due to restrictive arm movement. I'm sure this would be an issue with any similar sort of bracket though - it's not a mark against this product.
If you do a mock up on the floor (like I did the second time around...) then it's easy to make sure that you can both get the TV flat against the wall when you want it out of the way and also flush against both walls when at 45 degrees. In my case this meant I actually installed the bracket upside down to the recommendation (so that the hinge was on the other side and didn't restrict movement in the direction I wanted.