I immediately went to Spectra and never looked back.
Rather than looking back, look down to see the Spectra wrapped around your ankles. Heed Doc's advice and use a stretchy string that will spring out of the way when you release it.
Another suggestion is to mount the mechanism with the spring in the middle of the board, rather than at the front. Then the board doesn't rotate when you pull the string.
Better yet is to use Mark Wood's system of a car door lock solenoid and a garage door opener radio, both cheap from Amazon or Banggood. Then you can mount the release on the front of the board, neither you nor your airplane will get tangled in string, and you don't have to roll up the string when you leave the field. I don't use this system, because I leave my stooge on the field, and I don't want the electronics to get wet.