Have bought the mount for my MTB. The assembly on the bike is very easy (the stem is suitable for mounting on there). The holder will keep very good on the bike. My Nexus 4 fits like a glove in his pocket. Clean It's easier than out, but me personally a clever seat is more important than rapid removal. The bag is in quickly pushed into the holder and removed again. She has the holder an easy game, but this has not yet had a negative impact on me. The operation by the film works perfectly. Even with coarse inserts with a lot of mud and water, the bag has the phone well protected. A nice additional function provides the clip on the pocket, through which one can carry the bag to the belt or backpack strap. Perfect for trips in which one descends sometimes by bike. So you can take his smartphone equal in the Topeak bag and it does not have to be stuck in any pockets or otherwise.
So far I have absolutely no complaints nix. The described by other users milky film I have not in my pocket. The price is offered for the TOP, Rixen and Kaul wants significantly more money for the corresponding variant.