I had a Enco RF30 clone for 20+ years. It did me fine for my home and hobby projects. I got the bug to replace the bench mill with a Knee Mill. I found this forum and Precision Mathews. I really liked the PM-935 TS it would fit in my shop and would be a very good replacement to the Enco bench mill. I did my research and asked questions and was told about the differences between the J head machines ad the gear head machines. I was concerned about the noise from the gear head machines. I was not able to hear one of them run and I knew what a J head mill sounded like so I decided to buy the PM 935 TS mill. I am VERY happy with my PM-935 TS mill. I use the mill for hobby projects for home. I do not use it to do high production work or to try to make money. I do not make high precision parts. I mostly work with 6061 aluminum and mild steel. I bought a VFD for the mill and it is very easy to go from high speed to low speed. Yes, the J head has it's quirks, Yes, the head could be mounted to a heavier ram. But for what I do with the mill it is a HUGE upgrade from the Enco bench mill.
If you are looking for a mill to do production work with or for high tolerance work then the PM-935 is not your machine. If you are looking to make parts at home for a hobby or to support other hobbies then it is a darn good machine.
Just my 2 Cents
Roger L