I used both the MegaPoints Servo Controllers as well as the GF Controls Servo Controllers, on a regular basis - two different layouts.
My preference is GF Controls by far. Simple, good quality and easily and finely adjusted without having to look at the circuit board - you are free to look at the semaphore signal arm during adjustment. I find MegaPoints Controllers complicated by comparison, many repeated button presses (of small buttons), and no safe mode so the servo moves rapidly through it's range of motion during programming etc. From experience this result in damage to the semaphore signal mechanism or point tie bar. Each to his own though.