I've had one for a couple of months and really like it. Previously had a Garmin 500 and briefly tried a Garmin 800. Don't know about hidden features, but the setup with the app is great and like having email, text and call notifications on the Bolt (as long as you have your phone in your pocket), and the wireless data upload over wifi. I find the screen very crisp and easy to read. Definitely won't be returning it.