What's outstanding about Stanley is that it is a 20 min cab ride from Central. You have calm peaceful beaches just a cab ride away from the skyscraper and vibrant life of HK island.
The market is okay. You can find some cheap clothing and local art that you can find pretty much in any market.
There are a lot of small little restaurants around the market, but I would suggest to stop at the Boathouse, more expansive than the others but very good fish dishes,