Dremel attachemnt?

Ok put the question in wrong catagory to shifitng to here.
Anyone used the dremel tile grout clearing cutter?
are they any good.
B&Q over £27 plus £18 for spare cutter
Buck & Ryan tools about £18 including delivery +£10 for spare cutter. I'm jus waiting for B&Q's survey request.

Bob
February 2010