Instruct: Classify Amazon reviews into positive or negative sentiment
Query: would not recommend

I bought 4 of these blades of various lengths (20, [2] 22s, and a 24). Most (not all, mind you) of them smear already. I wouldn't recommend this blade, and definitely would not buy again. I bought due to the other overall good reviews, and the fact that at one point in time, Consumer Reports also recommended them. Considering several of these blades smear already, either Amazon sells blades that have a really old manufacture date and the rubber has worn out, or the product isn't up to par. I'm not sure which since I had a similar experience with some Rain-X blades too (also purchased from Amazon).