I love the pick for Rebecca's hair. I've never brushed her hair because her curls were so pretty when she first arrived, and I don't want to brush them out if I can help it. The pick lets me keep the tangles away without brushing out the curl and having to re-do it.
I've never had a problem with the balls on the ends getting stuck in her hair, but I can see how that could happen easily. Since hair tools usually have those little balls on them to protect human heads from getting seriously poked, I'm guessing a pick for dolls would be just as effective without them AND it would save anyone from having to worry about the balls getting stuck in the doll's hair.