The Rubi ND200 is a bit of a mixed bag really.
I've had mine for years,and yes the motor is good, and use a Motolit DNA wheel and it'll serve you well. It cuts lovely, but....
When mitering, i find if you have the machine stood on a wide flat surface it won't allow the bed to move to a full 45 degree position. Hard to explain, but the bed tilts to the right, so if you stand the machine on the right hand side of a bench, the bed will drop down further and give you the proper 45 degree cut.
The gauge is a bit duff and takes some setting up, and the guard post especially with a thin porcelain wheel doesn't allow the tile to slide very easily.But in spite of its faults i do like it.