Chefs was awful the night I was there in January. The food was uninspired and lacked appropriate seasoning, and the service was poorly timed and abrupt, borderline rude.
I don't know that there is any place in Epcot that I would really consider "high quality" other than Bistro de Paris. I personally enjoyed Tokyo Dining, Biergarten and Le Cellier the most of my meals at Epcot.