Hi Rush
Well I did buy a set of the centipede control board, breakout board and cable and have used it off and on for about a year. It does what it say's it does, It is reliable, It has a mile of inputs and outputs. And for a stepper based system I would recommend it highly. As far a speed goes it's no better then a parallel port - but for inputs and outputs it's great. They are also extremely well made.
I used it in my Lathe which has high count encoders and the centipede was not fast enough so I moved to a Ethernet Smooth Stepper (which are also not perfect but fast enough).
Sergey is working on an add on board to bring the centipede speed up as well as a lot of other features such as closed loop control and when this happens I think the centipede will be the pick of the external motion control systems.
So yes I do recommend it if you don't have a servo system with high count encoders. (the new add ons could be out any time so keep an eye on his website).
Steve