Have you looked at the website puertopollensa.com ? You should find all the reviews on there. It's a real mine of local information. Depending on your taste in food, there is something for everyone, so I do recommend you read the reviews written by brits who just can't get enough of the place! Haven't been for a couple of years, so places shut down and new ones open, you know how it is.
We like O Lume. Assuming they are still there, the location is on Calle Juan de la Cosa, off Calle Elcano. It isn't the poshest looking place, but the food is fantastic and traditional. The locals like to eat there, but quite late. If you look on the website you can print a street map to help you locate places.
There are a lot of restaurants along the Pine Walk on the sea front, and also in the main square, but prices are higher here. O Lume was a bit cheaper because it's not on the main drag.
You can get a bus over to Alcudia old town and eat there, and get a taxi back later when the buses have stopped which is what we did; or there is quite a posh restaurant in Pollensa village, but we haven't eaten there, although the menu looked fabulous. Taxi and bus timetables and prices on website. Have a lovely time!