Great visibility in front and big back lite. With the regular lights on the bike front and back it's making me very visible. Awesome to have light where I look.
I hav'nt taken it off since I got it a month and a half ago. I continually monitor my sleep and heart rate, I especially like the water proof feature but don't like the difficulty in setting up. It has motivated me to move and keep moving, take up serious cycling once again and to monitor my weight. All the set up and using faults are more than compensated for by the sophisticated and technical abilities it provides.
Having fully searched and researched other options I figured the Edge 520 was way more computer than I needed. Yet I decided to take a leap and spend the money. I am so glad I did! I am just getting back into serious riding again after a 25 year lay off and the Edge 520 is one more exciting motivation to get on the bike. Installation of sensors and computer mount and customized view setup was a breeze plus function is very intuitive. At first I wondered why it isn't a touch screen for the price but the buttons work great in all weather conditions. After each ride or indoor training session it is very rewarding to immediately get the prompt on my phone and iPad from both Strava and Garmin Connect saying my ride data is ready to view. Never thought I would get into the whole heart rate craze but it has truly taken my training to new levels.
This is a fun watch that you can get your important data from very easily. It is also easy to set up and use. The battery lasts about a week before needing recharging.