Indeed I have and used it pretty much from the time Unity became mandatory up until Cinnamon became stable enough to use day-to-day. I do like Xfce more than Unity, but not enough to keep using it. I actually really quite love Cinnamon and Mint in general, although it could do with a lot of polish, especially the default login manager which isn't the best. mint-update is very buggy too and half the time just doesn't work. Overall though, it's a happy experience and it looks better to me too.