I use to run a keyence but have switched over to lrp(smaller). The ko vfs-2000 and hara twister are both excellent speed controls and should not be dismissed right away.The keyence I found to be very smooth and the new rapida should not disappoint in this department.It is also one of the most programable esc's on the market to date the only one that is more programable is the ko vfs-2000/twister with the optional interface thing. But in the end it is always going to be which is better novak or lrp because people are to ignorant to consider all of the options they have like the keyence and ko propo/hara twister.