Heat and Bond Light works better than Pellon Wonder Under Light. Wonder Under is hard to get the paper to peel off no matter how well you follow the directions. Never had a problem with Heat and Bond Light.
To use up the 5 yards of Pellon Wonder Under the company sent me because it was not working for me ... I peel the film off the paper and throw away the paper or mark it to use for stablizer. Instead, I use parchment paper or an oven liner sheet. Works like a charm.