I have had this head for about five years and it has been consistently rock solid and still doesn't have any signs of wear. Recently I have been using it on a carbon Fibre mono pod and it does feel heavy compared to the mono pod but allows me to swivel into portrait mode with ease. I think if you are looking for a mid size and cheap head then this is the one to go for.
If I had to say anything negative about it, it would be that the plate could be longer because when a heavy lens is fitted to the camera, the whole lot tends to swivel a bit on the plate. There are replacement plates however, which I haven't tried. I have never been tempted to "over tighten" the screw into the base of the camera.