We use them all the time.  Just be sure to spring for the $5 front dust shield to protect the clutch or it will be out in about 100 hours. 

I must have needed to check up on the prices here....shop recently ordered a $150 A6 from the store in town to go on the 4430.  I just figured they had checked arround  and that the price must have gone up since the last time I bought one.