The cat C series had some issues with cooling and dust especially when mulching. The engineers went to work on it right away, however, I was in a tough position with contracts so I went back to Bobcat.
I still think the CAT suspension seat was the most comfortable I've ever used. My Bobcat M series air ride is not as comfortable.
I've considered going back to CAT but almost everything I own now is Bobcat and I have a really good relationship with my Bobcat dealer.
"Life is tough, but it's tougher if you're stupid."