Sapa township itself is a lovely town set around a lake, slowly being strangled by tourists. There is new construction everywhere, constant harrassment by local women and children wanting to sell things, and not really much to do. It is best to spend as much time as possible out of town.
I attended a craft workshop, held in a nearby village, and got to spend the day being shown how they do batik dying, weaving, and embroidery, and also assist in making a traditional lunch (ie I rolled up spring rolls and stirred the tomato and tofu).
The next day I had a bit of a look around town and then made an early escape to nearby Lao Cai to wait for the train. I spent a quiet afternoon reading and sipping drinks in a small restaurant.