Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BEST UPGRADE BANG FOR THE BUCK!

Hands down these are the best bang for the buck performance increase I did for my car this year.I bought the 19" & 21" to replace my previous Trico blades that supposedly had a lifetime warranty & was on it's last leg after nearly 2 years.I have found blades don't last that long esp. in 4 seasons outdoor conditions.Therefore, it makes no sense to buy more expensive blades when they don't show a clear definitive advantage!As for these Anco 3100 series - for a combine $10 for both delivered, out of the box, I feel like that dirt & smear fog has been lifted from my windshield.Yes, it's only been a couple of weeks, but it's not like I have to justify paying 3x that for something that wipes just as good as the pricier brands.I highly recommend these. as I said - BANG FOR THE BUCK!