The wands were... fine, in a word. They quickly figured out that the shorter yew wand cooperated better with Harry, while the longer willowy oak wand preferred Draco, but neither were as easily utilised as their own wands. Harry tried filling a glass with water, and while with his own wand it was a simple as turning on a tap, with the yew wand it was more akin to trying to force water out through a narrow straw - in the end it got the job done, but it was certainly far more effort.