I like the Bolt and my Garmin 520 doesn’t get much use anymore. Few things I like about the Bolt:
- Customization all done on the iPhone app.
- Zoom into fields
- Maps and navigation
Things I don’t like:
- Plastic feel and look
- Takes longer to boot up
- Takes longer to connect to all devices. So it might take few seconds more to find my power meter. Sometimes I will start the bike segment and the Bolt is still looking for my power meter. Where the Garmin 520 instantly connect to all devices.
- No Strava segments unless you have a premium Strava account if it’s something you care about. I personally don’t but also got used to seeing them when I used my Garmin.
- Currently only support Wahoo KICKR and SNAP. You can connect to other trainers but you won’t be able to control resistance like in the 520. They should be adding support to other trainers sometime this year via a firmware update.
Other than that, the Bolt is my main bike computer right now.