I like it a lot! It’s an entirely new action role playing game based on common elements of prior editions. I love how fluid and fast the action can get, how easy it is to adjudicate actions not directly covered by the rules. All calls felt natural and players agreed to my proposed calls without debate.
I adopted 4e once and for all sometime during the afternoon of my 2nd game… Here I was with complete strangers (most of which had no intention to switch to 4e), killing their PCs and still seeing excitement, trepidation and fun on all their faces.
One thing I will say for 4e: it's got a very kinetic vibe, with characters running across the battlemats and all sorts of "toys" to interact with. So hearing that Chatty is smitten with the game is hardly a surprise.
What is a bit of a surprise is hearing that James Mishler appears to be warming to the game.