Use Loctite on all the fasteners when you install, including the screw that holds the mirror on the frame. I've seen several posts on people losing the glass or the whole unit due to the fasteners coming loose.
The Motrax are ok, quality isn't quite as good as the name brand ones but it's OK. On the other hand, when you crack, break, whatever the Third-Eye it's easy to find and replace. Doesn't sit quite as high as the others but I'm ok with that.
Have fun
Scott