Portable swing analyzer

Seems like in the last month, there are several portable swing analyser has come into the market.
These are all coupled to smart phones via bluetooth.
These are the latest training aids. We are early in the technology curve and as the technology matures, I am sure there will be better products.
These may become your personal swing coach!

Examples in the market
a. swing sense -
b. swingbyte -
c. swingtip -
d. swingsmart
e. 3baysgsa

They are attached via different means ie glove (golf sense), shafts, or butt of shaft (3baysgsa); display different parameters, and of course different pricing.
Some are heavier and some are lighter. Some may obscure your view when you look down the shaft, while some don't.
Some are sold in Singapore, and some are yet to be available here.

Any brothers here has use them?
Care to share their experience?
How do they compare with trackman?
How do they compare with each other?


Thanks.

http://www.thelearningtee.com/swingbyte-2/

If you want to check out swingbyte, head out to learningtee in Kaki Bukit.

The sales rep there can explain further the specs and their readings. At S$239 its not a bad price after all.