Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Roebic K77 Root Killer

I've been using this for ten years, I was buying it at the local stores who are all out of business due to Lowe's & Home Depot. Walmart sold it for less than $9.00, they don't anymore, at least not in my area of NY. This works great, seems a lot simpler than the foam. Pour in 1/3, flush & again twice more until it's empty, leave over night, roots killed in a few days. What the heck happened to Roebics prices. $18 to $25 for a less than $10.00 product.