Ivory Reinert
It's been sturdy enough for the most part. There is a bit of side to side play, mostly due to the flexibility of the seat rail it's mounted to, but with the laptop lightly strapped to the mount's table it's good to go for any of the driving conditions I've encountered so far.
Did you go with the "Gold Mount" that they offer...or one of their others? I assumed there would be some side to side movement, but we are on pavement most of the time so it wouldn't be too much of a problem. Also I contacted them and they said that I would be using the seat bolt method, however, you are using the seat rail correct...I wonder which would be sturdier?