I bought this board to control an x-y servo stack to move a raspberry pi camera around (pan-tilt) by remote control. So far what I have seen is a mixed bag. I have been able to control individual servos from the PI (these are small 9 gm servos) but not with the precision or finesse I was expecting. When two servos are connected I get quite a bit of random movement that seems to be related to electrical noise on the power bus. I have powered the unit both from the sparkfun board's micro USB connector as well as the one on the Raspberry Pi Zero W. In both cases I get lots of random movement and in the former case I also have periodic crashing of the Pi. I'm thinking that the only way to get this board working right is to separate the 5 volt power between it and the Pi and probably greatly increase the amount of filtering on the supply to prevent high frequency noise from influencing the servos. When the above issues are combined with the very poor build quality of the pan-tilt assembly that was sold with it, I find a lot of room for buyers remorse. The mechanical connections between the servos and the plastic housings included are so poor that I doubt the pan-tilt mount can be made to function for more than a brief "test bench" demonstration without breaking or stripping out the screws used to attach servo arms to the plastic housings. In fact, the lower (pan) element cannot be interfaced to the servo with the arms provided as they don't match either the instructions or the molding of the plastic housing. This means that in order to even test the device I had to do significant hacking of the hardware of the kit. Not classy at all. Perhaps at some point I'll be able to make use of it but the amount of work to be done just to get the kit to function has sent me down the path of multiple fixed position cameras for now.