It's simple and it works. Very pleased that it is exactly what it should be.

Overall works as it is supposed to, but the product itself is made from cheap plastic and for $35, seems a little over priced. Hope it holds up in the real outside world.

Found others had the same problem which was very simple, you have to use a little force when plugging it in to get it to work. After that fine.

It worked as described right out of the box. I ran it by connecting it to a an Esprit 100 with an ASIAir Pro - just be sure to push the plug all the way in. The slow speed is very slow- allowing for very fine adjustment.

This controller works well, is simple and cheap. It would be nice if it came with the EAF, but is nice to have when you need to manually adjust something, because on my setup it doesn’t allow for hand use.

Once you attach the ZWO EAF to your OTA the EAF is hard connected to the focuser knob. There is no turning the focuser knob without this unit or a computer.