This was easy to install and it seems to be working well. I noticed the glands don't seem to be replaceable like the Sea Star cylinder glands are, which might prove to be an issue in the future because the glands break down over time and need replacing at some point. But, I bought this because it was about half the cost of the Sea Star system and it is of high enough quality for me to say that I am satisfied. The instructions aren't very clear and the illustrations aren't accurate but like others have said, if you're installing this yourself you likely have the ability to figure it out on your own like I did.