Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Good tool, but lousy and expensive blades....

I purchased a Fen tool when they first came out and while the tool is a wonderful concept, and does cutting jobs that are difficult with other saws, the cost, life and durability of replacement blades is ridiculous.I quickly ran out of the blades that came with the kit because they wore out extremely fast just cutting soft wood trim. I ordered two replacements blade from Amazon and although they were very expensive, they wore out just as fast as the blades that came with the Fein tool kit.I then went to Harbor Freight and bought a fine tooth Japanese trim saw to finish the job I was doing on flooring base boards and and door jams so that I could install a new oak floor.Until Fein brings down their prices on their blades, and improves the quality of the blades, that Fein tool of mine will remain a very expensive paperweight.