The machines can also tilt so that they lie at a nearly face-up 80-degree angle.

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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.

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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)

The 610 has a mechanism that allows you to slide it down so that the display is lying almost face-up and at an almost-flat 60-degree angle, a position HP is dubbing Recline Mode.

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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)

Heavy make-up or a mask will also work, as will tilting your head at a 15-degree angle, which fools the software into thinking you do not have a face, according to an online guide produced by hacktivist group Anonymous.

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