I have not had a problem with the flow stopper check valve kicking in under normal use. My street utility pressure is 95PSI (fairly high for a municipality), the washer is a Maytag built in 1998, the hoses are fed with 5/8 copper, valves wide open. I suppose if you have a washer where the solenoid really opens full and fast it can cause the hose to think its a disconnect and the check valve will kick in though. I also installed them on my kitchen sink (as that sits right above the electrical panel in the basement). I can turn on the kitchen sink as fast as possible and the flow stopper does not kick in, but I hope it kicks in should it need to.
The real reason I bought these over the non-flow stoppers was because if you look closely at the Home Depot regular hoses they are really not stanless steel braided, they are silver nylon braided made to look like metal, (this ruse fools a lot of home depot shoppers). But the flow stopper ones were actually stainless braided and the real reason they cost so much more. I would never buy regular hoses at home depot simply because they are not really stainless steel (at least in my neighborhood), I go to Menards where all their hoses are stanless steel.