The device saves all the data from each hit, namely the animation, path, putter-face angle at impact and throughout the stroke, angle of attack, tempo, impact speed and swing path distance -- in other words, more information than most players would know what to do with.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)

The path, tempo and face angle seemed to line up fine in this admittedly un-scientific test, but more importantly, when the device said a putt was bad, we generally missed it.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)

Following each flail, a clear graphic representation of your stroke path along with several key stats will display on your device: the critical putter-face angle at impact and tempo, among others.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)