N.I.N.A. works very well with this focuser and great 'V' graphs can be achieved with the right settings in N.I.N.A. The focuser runs smooth and has been fine running with night time temps in the upper 20's/F. Its incremental steps are small enough to achieve a laser quality focus point. Being able to manually unlock the clutch and adjust is a great convenience to get close to focus before running autofocus. Works well for when you are switching between visual and imaging as well. Easy install with one exception. You need to make sure you are aligned well on the stock focuser shaft. Any little skew will cause focuser to bind or have a 'sticky' spot. Set screws should be adjusted lightly, back to back, each a little at a time. Here is where a half star is taken away and it has no real bearing on OPT. Once installed, the software download is easy, albeit not a lot of documentation. You have to launch with the web interface before N.I.N.A. will see it and connect. Once connected, you can close the interface. It is important that you pick and always use the same USB port to keep the interface from getting confused. Connect power to the focuser, connect the USB cable from focuser to computer, launch the interface and it should auto find and allow connection. Note the port it used. Be sure when connecting up, you only have the focuser connected and no other equipment. It helps the program to easily locate focuser.