Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great stuff.

I ride about 20 miles per day whenever the weather permits and was averaging one flat tire every 10 days. Then I got Slime and also installed a special liner on the inside of my tires. Have gone many months now with not one flat. The Slime is easy to install and I put half a bottle in each tire. Although it has been about a year, there was also one incident where the Slime sealed the leak long enough for me to get home, avoiding a long walk. I have also noticed that with Slime in the tubes I have to air them less often (tubes naturally lose air over time and prior to Slime I was having to air my tires every week - now I just check them once a month). One caution is in order and that is that Slime does not seal all leaks. Slime is great for punctures, like from a nail, but it usually does not seal cuts or slashes in the tube (say from a piece of glass making much more than a simple puncture).