New to Fire: How is it?

Hey guys!

I've played Frost/Arcane Mage for about 8 years now, and only dabbled in Fire a couple times (like when Frostfire was big back in Wrath. MAN I miss that spec.)

Anyway! I was really wanting to jump into it and try it, but how is it performing right now? Is it clunky? Is it enjoyable generally? I can only get so much from Noxxic guides, and figured I may as well ask if anybody has any opinions around here.

Cheers!