Pros: Over all a very good device, In case you have problems with this device you can get replacement parts on: http://shop.repair-my-device.com/garmin-edge-510-edge-500j-lcd-screen-and-touch-screen-digitizer-glass-with-frame-replacement-part?search=garmin%20edge%20510 Original components.
Buy something else, preferable a non-garmin product.
7 April 2016
Summary: Buggy and bad connections as well as bad user interface. Most of the promised technologies never work consistently. Garmin ignores all inquiries to fix any products. Skip this product and support someone who supports their own devices.
Lost rides, settings - I am done with Garmin products
Amazon Customer, Amazon
12 March 2016
Summary: I have now completely lost all settings and rides (for the second time). The first time was a random failure of the unit. This second time was after downloading a "software update" that erased all user settings and files.
Summary: I owned the Garmin Edge 500 and had no issues. Thought I would upgrade to a 510 and nothing but issues. All I wanted speed sensor, heart monitor and time. Nothing consistent for this model except display layouts are not correct.