Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great tool but has faulty variable speed switch

If it were not for the problems it has with the variable speed switch this would be a wonderful tool for small jobs. I was very happy with it for about two years of infrequent use. I didn't use it all that often but when I did it was invaluable. But then the speed switch stop varying the speed. It would either be off or at maximum speed. After doing a little research I found out that this is not an uncommon problem with this model. If it were not for this I would be giving it 5 stars. Since most jobs need a slower speed it has become rather useless to me now.