If it's the newer Spektrum stuff, it's not bad but latency is still not as low as I would like. First gen Spektrum, dump it now and upgrade to something better. Don't use Savox servos with it, glitching is a known problem with that combo. Savox and a Tekin with a Spektrum, don't even go to the track, leave it on the shelf. Futaba or JR servo with a Tekin or whatever speedo and you should be good.