As I have a few bikes, and wouldn't want to get one for each bike, I was hoping to carry this from bike to bike.  I never thought the installation would be such a chore though.  You need an allen wrench (provided) every time you go through it.  Since the heads of the screws are not facing out to turn the wrench easily, patience is needed each time you try to unmount from one bike and mount on the other one.

Other than that, it seems to be made of decent quality materials, and although not very sturdy, it seems to have enough strength to hold the smartphone securely.  I had no problem while riding on paved roads with a mountain bike.  I did go through minor bumps and pot holes, but nothing major.

I have a little concern for long term use.  Plastic parts mate together by friction only (sliding into each other).  Although they seem to be holding fine now, that might change after some time under vibration and temperature variations.
As I have a few bikes, and wouldn't want to get one for each bike, I was hoping to carry this from bike to bike. I never thought the installation would be such a chore though. You need an allen wrench (provided) every time you go through it. Since the heads of the screws are not facing out to turn the wrench easily, patience is needed each time you try to unmount from one bike and mount on the other one. Other than that, it seems to be made of decent quality materials, and although not very sturdy, it seems to have enough strength to hold the smartphone securely. I had no problem while riding on paved roads with a mountain bike. I did go through minor bumps and pot holes, but nothing major. I have a little concern for long term use. Plastic parts mate together by friction only (sliding into each other). Although they seem to be holding fine now, that might change after some time under vibration and temperature variations.