I'm interested to see if it is better than my Yupiteru Atlas. I get ball speed, CH speed smash factor. I can set it to club and it keeps a history. That's everything I want. Although it would be nice to see the angle of approach. Also it was super cheap. As for accuracy I made a comparison against a flight scope and found that it performed very well. However, could you imagine the interruptions you get while on a range while using 2 devices. Golfers are a curious lot.
I've been looking at these and others with lithium battery packs. What struck me as crazy is the price of a replacement battery.
The ewheels replacement battery was the only one reasonably priced.