THE BAD
Driver/car owner transponder's should
"ALWAYS" be clean & the biggest problem
"at my local track" is the driver/owners of the cars
don't mount the transponder properly.
You can tell some one roll there car under the start/finish 20 times an it works, then in race they miss laps.
You have to talk to driver/owners to reposition there transponder.
THE GOOD
Transponders are almost 1/3 the price of AMBrc
http://rclapcounter.com/page1/page1.html
http://www.amainhobbies.com/product_...ed-Transponder(ambrc transponders can be had cheaper than this, just an EXAMPLE)
The system is worth every cent that you pay for it
if the transponders are mounted correctly.
Can you tell I HATE COUNTING MISSED LAPS