I've been using one since they became available in the US. I invert it over a kettle and use a CIP ball to clean it. I did an initial boil and scrub when I bought it but after that, I just use a CIP ball to clean it.
I have a customized 4" tri-clover lid for mine. It has 2 ball lock valves, a thermowell and a 1.5" TC ferrule, all welded on. Since I do big dry hops, I use a Clear Beer system instead of diptube, so I don't need to worry about clogs. Pressure fermentation and closed transfers are a breeze, and the lid allows me to easily pop off the lid and add hops while flushing the headspace with CO2 to reduce O2 ingress.
I've since moved to a conical and can use the same lid on that, but I'll keep the kegmenter as a backup fermenter.