I’ve had two on different bikes and it’s worked very well.
As TR says, there’s a small amount of play out the box which got a little worse in the following months, but a year on and it hasn’t changed. I don’t notice it when riding, just when moving the bike around.
I really rate them. I picked up a nasty scuff to the stantion on the 120mm and a year later, it’s still working. No service done to either, other than a clean and silicon spray on the seals. I recommend them. In the sales they were around £100.
The 120mm came with a horrible leaver; difficult to set up, limited adjustability & horrible feel.
The 150mm came with a different leaver that is much nicer; better ergonomics, easier to fit, nice actuation and aesthetics.