The device looked good on paper, but I found it difficult to turn it on or off as the device didn't respond to inputs or responded randomly. The user interface is so-so. The biggest problem was that the device vibrated off the mount when cycling on the freeway, even though I checked everything for tightness before driving. Luckily, it kind of fell into my seat, which is why I still have it, although I don't plan on using it in the future and wish I could just spend $50 on gas instead. When I discovered these issues, the return window was closed and I was unable to contact the seller.