Get a sensored ESC for it... It's definetely worth it! The feel in the throttle is so much more refined - so much that since I changed to it, I'm way more comfortable and confident in my car, my jumping (which was a problem before) became way more consistent and my results are considerably higher since!
Testament to this are my last two races in the Belgian-Dutch championship... I finished 23rd both times, with qualifying spots of 21st and 25th - this was in a field of 40-45 cars. Interestingly enough, before the switch I was consistently driving around the 30th spot!