This tech has been around for a few years now. The first on the market was the Eagle Tree system, Spektrum and Nomadio radios also have data logging options.
Having done some testing on these systems I can honestly say that the info they give, while interesting, is no way near as telling as the "feel" of the car you get when you are driving it.
Quite entertaining to play back your races, but the novelty wears off.
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