Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Impressive!

First if all your going to read in almost every review on how bad the instructions are well let me tell you. Don't need them! Type in Eheim 2215 on you tube they have all kinds of videos on how to assemble. Had it up and running in less than 15 minutes. Water was crystal clear in a couple of hours!!! Extremely quiet and parts don't look cheap built to last. Did a lot of research on canister filters so glad I went with Eheim!!!