My 12yr old has been using his holster for around a month now. He loved that he could personalise it and was very pleased with the design when it arrived. The pump (780G) fits very securely and the holster feels really sturdy. The clip is strong and hasn't detached itself once, even when running around and during PE lessons. He has said that the only thing he can think of that would improve it would be to have somewhere to wind up some of the excess pump tubing as it can be a bit of a pain sometimes. He has found using the holster much more comfortable than using a pump belt and feels like it looks more grown up too. All- in-all, he is extremely happy with it and we would highly recommend it.