Few comments:
1) Not that great as a mainsheet in boats with 8:1 or greater purchase systems. Too much friction to smoothly let the line out in lighter airs at the diameter required for the loads and hand holding. Tapered mainsheets are worth every penny
2) They do slip in the cleats when used as a halyard. I have added a polyester cover to my spinnaker halyard to eliminate this. Others are using a double cleat with success.
3) Be careful using salsa line as a jib sheet. It in particular doesn't have enough mass to easily be flicked from the cleat.
4) FSE Robline Racing Sheet works great as a spinnaker sheet!
Those hybrid lines are terrible for spinnaker halyards with regards to cleating. I won't use them anymore. You just can't beat the old Marlow pre-stretch poly line, stripped of it's core, and re-cored with 1/8" amsteel....although, typing this, I just think I figured out why I'm having so much trouble with burn holes in my spinnakers.
