Hi all, my 0.02€ worth,
I rallied today a regular practice with the coach. I was very sensory; had the Sony Sensor on the racket, but more importantly I was playing on a zenniz-court (
www.zenniz.com) and also had the In/Out sitting on the netpost.
The stats given are shown side by side in the attached picture (and only for reference, thank you very much. I know very well that I'm a feeble hitter, but that's another story on another topic).
I stopped using the In/Out at one point, because it kept flashing the red although balls were very clearly in and the red flashes were distracting and annoying. It was a training session so I did not have the time to "teach" the In/Out -device.
Some comments regarding the session:
+ There's a general resemblance in the patterns
+ The average speed is a very good estimate.
- The top-readings are wayyy off. When and if I get to "put the ball away" I reach speed in the range of 115-125km/h. No groundstrokes ever reach 131km/h, let alone 174 km/h.
+ The "In" percentages are somehat in line (80,7% vs. 84%) but there is a discrepancy nevertheless. I assume it's because the In/Out is not just quite there yet.
Overall: It seems to give a ballpark (tennis court) idea how (fast) and where you're hitting. But I still hope more accuracy.
Some overall comments after 36 uploaded sessions with 1680 shots:
- Can't use the device more than 30-40 minutes. Then it overheats (or something) and is not providing any kind of useful aid in the court. This is, in my opinion, the greatest weakness of the gizmo and a clear weakness. I have used the device both videorecording and just line calling. Still just the 30-40 minutes.
- With the latest firmware update I seem to have lost the ability to track individual self-fed shots. This was possible before.
. Have not tried the serve practise.
+ No problems whatsoever with the court detection. Always successful on the first or second try. Been using the device at inside courts with different lighting options (regular white tubes, (horrible) yellow/orange tubes, LED tubes), courts also with varying colors, mostly green, orange or blue plexipave. No additional lines on any of the courts.
All in all, it's definately still in beta. Going to the right direction. Wish everything would be happening a little faster.
rgs,
mika