Comments: I was pretty skeptical of the mounting system, because it seemed that the silicone over-the-butt-cap
holder would put the unit in the way of everything, but it's just about as close to unnoticeable as it can be -- and I hang my little
finger off the bottom of the butt cap on my serve. Maybe it helps that I put my over grip on top of the holder. First day, I broke the
session up into warm-up, drills, set one, set two, set three, etc., although this was in part to see how well the Zepp sensor
communicated with my iPhone. It worked every time. I then noticed that the impact locations weren't showing up, and some of the
on-screen buttons weren't working correctly. I received notification that there was a firmware update, which went perfectly, and
afterwards somehow all my data started appearing in the app, and the buttons worked as expected. I'd love to put this on a
Babolat Play to compare the data, but not having a Babolat Play at my disposal any longer, I can say that the Zepp sensor is
impressive. First, I like the fact that it allows you to use any racquet. My racquets are a lot heavier (and with a lot higher swing
weight) than a Pure Drive, so even if the price was comparable, the Zepp is the better unit for my needs. Second, I like that there's
one button instead of the two on the Babolat Play. You turn it on, you turn it off, you wake it up -- pretty simple. One button is
plenty. Third, I like the status light array. The lights march one way when turning on, the other way when turning off, and there
are other sequences for other modes. Very nice. The app displays data clearly, and it's easy to get to the screen/page you're
seeking. A couple things the Zepp Sensor doesn't have that the Babolat Play does: 1) the "social" connection with out Zepp sensor
users, 2) the ability to connect using your computer/browser via USB, and 3) the ability to download your data. None of these are a
big deal for me, however. I can see how it might be nice to share data with others (such as coaches), but the Zepp sensor
downloads to my iPhone without drama so I don't feel the need to have the USB data connection as a backup. The only thing I've
found that I don't like is the "pro" holder that sticks to the butt cap. It looks impressive, but the Zepp sensor flies out on impact
about every ten shots (for me, at least), so I've had to resort to taping the sensor into the pro mount to retain it during play.
If this is the first generation of this technology, I can't wait to see what the future holds.
Also, the Zepp sensor has one feature not found in the Babolat Play: The serve practice mode. Normally, you use it in training
mode, but you can switch to serve mode and hit a bunch of serves. The app will then show you a 3D representation of your service
motion. Who needs a video camera and analysis software when you have the data straight from the racquet?