My family did this buffet a few years ago. I'll start with being nice - it's super low-key, not at all like the usual WDW character dinner. Sometimes the noise and chaos at Chef Mickey's just makes me angry....
But the characters costumes were a smidge dingy. And it was just Goofy and Pluto.
The food was just okay. Not as big a selection as a normal Disney buffet. Somewhat reminiscent of a mid 80s Howard Johnson holiday buffet..... On the bright side, the desserts were substantially better than the usual Disney buffets. They actually taste like something... I swear Disney desserts are more about beauty and shelf life than actually being yummy.