The clear instructions made my mount easy to put together and fit to my bike. It feels very sturdy, and because it's dead-centre, its in the right place to use my phone as a sat nav without taking my eyes too far off the road :)
Very easy to use and stops the chain lube going over wheels etc and just on the chain. Also it's at a very good price and I'm very impressed with the quality even though its 3D printed. Top bit of kit.