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Which is exactly the point I was making, but clearly passed people by.
Data logging on it's own is completely useless, it is the interpretation of the data that is the important bit.
And the interpretation can misdirect you, whether it is due to incorrect calibration, lack of experience, lack of data for comparison, a faulty sensor, electrical noise, software bugs etc etc etc.
Even something as simple as the lap beacon being at the different end of the pit lane between runs can cause confusion.
In short, the best system is probably the easiest one to use but that can grow as your experience and requirements grow. And the more it can do to protect you from possible human (or other) errors the better.
For this reason the PI system (or whatever is replacing it) is probably the best. Whilst the display itself is barely adequate (very minimal information) the hardware, software and support is probably streets ahead of the more budget orientated offerings. A quick flick through the manual shows just how driver orientated the driver bits of the system are, and how detailed and flexible the analysis software is for the team when back in the pits.
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