I use the telemetry information as part of my monitoring and maintenance program. I never look at the information or otherwise access it during a contest until after I have flown, but at that point I can see what my high and low voltages were on both my RX and motor packs. Combined with the charging data this gives me another important data point to help determine the health and performance of my batteries, both RX and motor. Not sure how that can be perceived as cheating.