Nope, sadly I'm so busy with work that couldn't even beta test it. In all honesty though, for the near future, I don't think I will switch. I think either 2 things need to happen for me to switch.
1: My games become a financial success that paying for subscription makes financial sense to me.
2: C3 comes with all the features that I think I need to make my games, and not depend on tonnes of plugins and wrappers.
Do hope that once I'm free I'll be able to test C3 out though, cause nothing is better than trying it out and decide for yourself.