Having tried out many different alternative fittings over the years I still prefer the EZ snap fittings. The worst fittings are definitely hoselock, they really are a waste of time and money. For a couple of years I used the pro fittings but they could be very stiff to release as the fitting got older. Whilst EZ snap are not perfect, they are easy to use and are very light and compact. I do find that they are sensitive to grit, which is usually the cause of the collar jamming. I never use WD40 on them, just spray them out with water if I see dirt in there.