I agree with what Rich and Bird said - if they were something unusual that I wanted to try, or real hard to get, then I'd probably try them.
But like Gene said, they're only a few bob for decent street pads. When I first bought overhauled calipers, they were lip seal type and when I pulled the car off the road to do the front end, one front and one rear caliper eventually leaked and the pads on those wheels got very wet. There weren't many k's on them before I pulled the car off the road but when I overhaled the calipers myself and converted them to 'O' ring, I bought new pads for all 4 wheels.
Just my 2c...