I currently have it on my 100G Half Cylinder and have to say it's just a great product for my needs. I have it on a very slow pulse mode, at about 50% power. Its the only powerhead in my tank, I have an Eheim 1262 return pump pushing water into the display... and that's it. So far so good, I doubt I'll need to add more flow to the tank.
My only gripe was that this powerhead (The Gyre Generator), given it's flow power, only came with a magnet for up to 3/4". My tank is 1" thick acrylic, and I am currently using my Great White Algae magnet to hold the Generator in my tank! Tankfully, I was informed by CoralVue that the upgrade magnets are coming out in about a week.