depends what you are doing, on just how useful telemetry is. I dont use my cars/trucks for anything other then playing...but the boats, thats a different story.

In my boats that are used for going after national records... its a big help for tuning. Head temp, EGT, RPM all give you the info needed to help in getting the most performance out of your setup. RPM really being the biggest benefit, as knowing the speed im running, and RPM im turning.. i can calculate real slip %, which helps determine which direction to go in prop tweaking, and let me know if i need more or less pitch to match the RPM the engine wants to be at.


Though i have no experience with the Spectrum telemetry as you could not pay me to put anything Spectrum in anything RC i have. I use EagleTree and download data to laptop after each run instead of trying to look at a screen while driving.