I had an old McCormick and I loved it. We bought it for $35 at an auction. But it was just too big and I only keep 12 goats and only separate about 10 times a year. So, I sold it and bought a NOVO.
The NOVO has plastic housing and bowl but the cone pieces are made of stainless steel. It is easy to use, clean and store. Also, if any part of the separator breaks or get lost they will replace parts!! They are a small family owned business and very nice people to work with. I bought mine 4 years ago when they were just starting out on ebay and have never had a problem with it.