Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Blades dull quickley

The Mccullough MCS2001 shredder is just that, no more. It will work well with leaves and twigs. It started out just fine, chipping branches of an inch or better, shaving them off like butter. After two uses, the blades are now are so dull it will not chip a 1/2" twig, instead shredding the end and clogging the cutting head. A dissappointment to say the least from Mccullough.