The big downside is the sticky pad. The one that sticks to the dash is excellent, but the one that sticks the suction bit to the arm is really poor. I've bought 3 extra sticky pads at about £11 each now.
I'm about to order another one for another car but this time I'm going to mount that to a Brodit holder (with a little help from a 3d printer).
Can't recommend the cradle itself highly enough though. When the pad is sticking it's pretty good at not bouncing around too.