I have one, and I had issues with hand controller at first, as well as issues with EAF losing position. Firmware update fixed all. However, when you update the firmware make sure that the EAF is the only USB ASCOM device connected, else firmware update fails, doesn't give an error just stops. I missed this on first update attempt, causing a bit of frustration.
Hand controller works fine now. Only issue I currently have is that SGP won't send the focuser to zero after sequence complete. I think it is because there is still a filter in place with a position set in the filter list. I may have to set my clear filter position to 0 focus position and move it into place before attempting to send focuser to zero. I am using the "Auto Adjust Focus Per Filter" option.
Also, the unit does not appear to have an absolute encoder. So if the position is changed while not connected to PC and software, it will sometimes lose position. Usually it will show the last used focus position when the unit is actually at 0. If it is truly at 0, then using the "Set to Zero" function in the ASCOM setting panel, or ASICap resolves the issue. Set to Zero button in SGP does not seem to work either.