I had it on my previous tank. It was "ok". I wasn't as fond of it as I am his skimmers.
First, the Regulator you can get with it is bottom of the barrel and the needle valve that comes with it is junk. Much too sensitive.
I replaced this with a AP Carbon Doser and it made a world of difference. Later I built my own high end dual stage reg with a Hoke needle valve which was fantastic.
But back to the reactor itself... I'd get a Geo instead. It has the opposite flow of the LR, which most say is better.
And LR says that they put place their pH problem down low so it takes up less space and won't get broken like a Geo where it sticks out the top, but if you ever want to calibrate the probe you have to drain the whole reactor.
Major pain in the hoo-ha.
I can say I never had any issues running it. No trapped gas, a good media like Two Little Fishies Reborn dissolved well, and even the cheap feed pump that comes with it worked fine for me. Except I did have to remove the quick disconnect where the tank water entered the pump because the screen would clog.
With a good reg and a good feed pump like a Cole-Parmer Masterflex it was rock solid and real easy to use. No ph controller or apex needed. It ran 24/7. I just kept an eye on the pH levels with a monitor.
It was mainly the location of the pH probe I didn't like.
