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

This is perfect for my patio.I had a tough install. I had to tunnel up under the concrete for a retrofit.This drain did a great job and was one of the easiest parts of the job.I attached the exit port of this drain to a 25' french drain pipe. So far it has taken all the water that I give it. I may go back and lengthen the drain pipe length just because I like to overdo stuff.