I haven’t used one for at least 15 years now. Before that I used several and had no complaints. My only question would be availability of repair parts. I have an L-Tec (Linde) mig machine that is almost impossible to find parts for in a timely manner. I stick to Lincoln and Miller now.
We have quite a few of them at the lab at school. The CV machines are alright, but the CC machines really do have a poor arc on both TIG and stick. They also seem to go out of service more often than the blue machines.