We ahve some really blunt sabatier knives. I have been meaning to buy a knfe sharpener for ages has anyone used this one www.lakeland.co.uk/F/product/1888
Is it any good ? Dh has the impression that it sharpens them to a serrated edge 
Said he read it ion a review.
Any other reccommendations ? The amount of time it takes me to chop an onion is ridiculous ...
thanks