Just to temper the general euphoria.
I used these for a while last year.
They were fine for a while but...
1. The valve stopped working on two out of three of the female connectors within a handful of weeks.
2. If you accidentally step on one, it will break immediately in a way a steel one simply cannot.
I gave up and went back to EZ-snap. Cheaper and lasted longer (for me)
In passing, I do find the price for these pieces of injection-moulded plastic utterly, utterly shocking. Not aquadapter's fault, the suppliers, but barmy.
Vin