Love love love this yarn shop. It's only my second time visiting the Knitting Tree, as it's a bit of a drive from MKE, but it is a lovely shop. The woman who owns the shop (she has a business partner that I've not met) is helpful and very friendly.
But the best part about this shop is the variety of yarn within its four walls -- Malabrigo, Madelinetosh, and plenty of other hand painted yarns to choose from, and in many different weights.