I have tested these connectors and they are very well made. However the reason that we are not selling them is that they work best when used exclusively with the same brand of connectors (such as from the reel male to the female adapter).
They are not very compatible with other makes such as brass swivel connectors or partly worn Hozelock connectors. We found that they were less compatible in testing than any other brand of standard hose connector - Hozelock and the ubiquitous Orange/Black connectors were much more tolerant of less than ideal connections.
So if you are converting all of your system to them, they will work well - however this would only be feasible if your are also using a Claber reel.