Kestral is a sponsor of this series so if you are looking for one give them some consideration
http://www.kestrelweather.com/I have a TAG Systems that I have had for a long time but only use it now to see how close I come to guessing he DA. I change the car too much for it to be consistent to log and and predict and ET for me. For example, I may weigh a different amount from race to race and may stage the car in a different spot depending on the class I am running so logging is not going to help me much.
If you are consistently doing everything the same with staging, weight, shifting and all else...it is a very good tool for logging runs and having it predict on current conditions.
