Works quite well, a bit of a pain to pipe in. I used the excess flow to drive downstream valves with no problem. I purchased the version with the built in relief valve. This was not necessary with the downstream use, as there is no direct return to tank on my setup. Only slight issue is it not very linear, as most of the control appears at the low end of the controlled flow. Possibly caused by tractor oil being similar to ATF fluid.
I also had issues with lowering my loader, as the centre closed valve gear opens to tank on lowering, and uses gravity to lower the loader. Therefore no speed control on the lowering. I had to fit a pressure relief valve with reverse check to allow controlled driving down.