I bought this to replace an older Zumo 350. I wanted to take advantage of Bluetooth to be able to hear the turn-by-turn directions, and to also take phone calls and receive texts via the GPS unit. I have a Samsung S7 phone and a Sena 10S headset. My initial pairing went well, but about halfway through the ride I had some issues that ended up being due to another Bluetooth device I had paired to my phone (a Samsung Gear watch). Once I figured that out, I had no problems with hearing and controlling music that was on my phone, taking calls, seeing texts on my GPS, or hearing the directions. I do know that not all headsets will work with it: check with your headset manufacturer and Garmin if you aren't sure.One of the things I appreciate is the ability to tell it to not route you on unpaved roads, which I have mine set to do. While on my first ride, I tried out the Adventure mode. Loved that it took me on roads I had never been on before, but it did try to out me on gravel roads a few times. I don't know whether the Adventure mode overrides the previously mentioned setting, or if the data they have for those roads doesn't show them as an unpaved. All that being said, I would like to see a way to submit changes to their maps for situations similar to this.Another choice they have made that I don't understand is that they take info from and submit info to Foursquare. I was never into that, but I don't think anyone has been in years. Because of the GPS, I made an account, and the latest reviews for places I looked at were around 2012-2013 timeframe. Seems like they could have chosen a more relevant partner.Overall I'm happy with this unit, but it's not perfect.