I wear my PF at night, but I made a few mods for extreme comfort.
I tied a rope to the foot board of my bed and I take the white belt from my PF and attach it to the rope using the Velcro. I then attach the PF to the belt.
This gives me a nice strong pull straight down all night. And since it's not attached to my leg or waist I can turn and roll around without it coming loose or loosing vacuum.
I also made a few mods to the PF itself
I replaced the standard condom
sleeve with the sleeves from ABS silicone and also from my autoextender.
I also replaced the factory attachment for PF which has the springs and the loop the belt connects to with some small bailing wire from Home Depot. I wrapped the wire under the ridge of the bell a few time and made a loop with the wire. I then use a carabiner to attach the wire loop to the loop on the white belt.
Boom, I sleep for 6-8 hrs and wake up with everything still intact.