Instruct: Classify a given review into positive or negative sentiment.
Query: Excellent Commuter Tube

I use these on my daily 30+ mile commute, in the past year I've had to replace them once. As stated in other reviews you can not patch them. Also in my experience you can't replace the air in the tire to the maximum recommended pressure after a puncture. What they have done for near 2 years is get me to work and home again without replacing or patching the tube during the ride. Good enough for me.