I got the Core watch - Cool device. I really find the vibration-based metronome an effective tool for practicing being on tempo in a way that forces you to feel it more than hear it. The other features (timer, stopwatch, display of notifications from the phone, etc.) I find convenient and the interface is smooth enough to use. Lower rating only because I find the tuner is not very responsive - certainly not comparable to a snark or other clip- on tuners. Also, it seems pretty limited with what range of frequencies (instruments) it can pick up. I play mandolin and it really struggles with the two high strings on that. Maybe it’s a bit more geared toward guitars, but I wasn’t very happy with the how responsive and accurate it was even with a regular 6 string acoustic. All the other features work well and are nice and easy to use, but for the amount of money these cost, I expected more of the tuner. That’s a pretty big drawback for me. For $20 you can buy one that works better. Heck, even using tuning apps on my iPhone works better. I liked the idea of having all these features in one place in this cool watch.. but I still end up having to grab a stand alone tuner. I think the magnet mount idea is really neat, but the tuner function itself needs improvement to compare with any other store bought stand alone electronic tuner. Otherwise, would be nice if they added a pitch feature to the tuner function (where it could produce the note you are wanting to tune to), as that can be more coneveint then struggling with a tuner that can’t pick up the frequency of the string you’re playing very well.