As mentioned above, it's really an individual's choice as to what works best for their particular use.
In my case, I bought a flail mower and paid extra for the FF's. I heard they were supposed to be better for easy attachment and to keep clean. I spent a bunch more money to convert two tractors and 3 other implements to FF's.
After a couple of years, I went back to the Pioneer/ag type connectors. The FF's were easier to keep clean and didn't leak as much but they were a bear to connect under pressure. As others have said, there is no way to bleed off pressure without loosening the fitting.
I use male AG's on the implements and females on the tractors. The pressure can be relieved on the female side by operating the valves on the tractor. The pressure on the male AG's is easy to relieve by tapping the ball end on a block of wood.
To make it even easier to work with the AG's, I made up this simple tool from a cheap Harbor Freight welding clamp:
Amazing deals on this Locking Welding Clamp at Harbor Freight. Quality tools & low prices.
www.harborfreight.com
I used an angle grinder to open the jaws a bit to fit the grooves on the Pioneer AG's.
Use what you like but for me anyway, I never found the FF's to be any easier to work with than the AG's.
