Instruct: Classify the given Amazon review as either positive or negative.
Query: Poor quality, dull, ready for replacement after about 15 uses

I would not recommend this product. I bought these razor blades to replace the old ones that had been in the razor for over 1 year. The new ones lasted no time at all. I am saving up to buy a different razor, because I have no intention of paying another $30 for worthless blades. Do not buy!