I first came across these 7 years ago just as I was starting up Brighton retic and over that time I’d rate them as brilliant nozzles. As well as operating efficiently on properties with low flow rates, they have proven to be highly durable.
I have often installed these on properties and returned several years later to find they are still working perfectly. Generally if an MP stops working it is simply a case of removing the nozzle and filter, cleaning the filter and then reassembling. The filter catches most of the junk and stops it affecting the nozzle.
They aren’t cheap but they do offer excellent results and longevity.