there a high end radio and the response time on it is just a ton faster compared to an xs3. And with spektrum the m8/11 radio's become even faster. The response time was a very huge improvement when I got my m8. I would say the response time was twice as fast compared to xs3. To me it seemed like that anyways. Lets just say i had to turn up my servo's speed with the xs3 and with the m8 i had to turn it down a lot.