I'm surprised not to see more attention paid to Little D's Eatery on this board. Park Slope's not a great dining neighborhood, and this place strikes me as underappreciated.
My wife and I have eaten there numerous times, we have recommended it to friends, and we have taken several out-of-town guests there. It's a unanimous favorite. Right now it ranks with Al Di La as our favorite place is PS, and every one of our guests who have returned to NYC have asked to go back to LD.
We ate there last night and had an outstanding meal, highlighted by a special of catfish, crawfish, and a chile relleno. Was skeptical of how this would turn out, but I didn't need to be. The food was perfect.
The service is friendly, the decor is pleasant, the food is excellent. I wholeheartedly recommend it to anyone dining in Park Slope.