First of all Im not saying that people aren't having problems with them indoors (I don't run indoors) but I haven't had a single problem with it out doors...... and as far as the spektrums "responce time" otherwise known as a units (latency)..........a regular M8 (which is considered fast) has a rating of 12 milliseconds and the spektrum has 5.6 milliseconds (the spektrum is over twice as fast.......to me it's made racing 100times more enjoyable........being able to turn on your radio and make adjustments in the pits(without fear of messing anyone up).....never waiting at the drivers stand for a frequency pin that's probably been lost for 3 weeks (always my luck) and "most importantly" no one can leave their radio on from a couple races before my main at a big event and make me crazy