Like others, it did take a request to customer service to obtain the correct build instructions, but the reply was fast with the correct support package emailed in less than 24 hours. The stepper motor drivers provide an adjustment for each axis which was needed to get the motors to operate smoothly, but I was quickly controlling with G-code and learning about GRBL settings (the GRBL_Settings_Pocket_Guide_Rev_B.pdf was a helpful find). I can't speak to the Windows S/W supplied, but the kit was a quick build and it works as I expected.