I shot blazer vanes through my whisker biscuit for 2 years. Didn't have a bit of a problem. Like anything, practice, practice, and make everything you do consistent each shot. You won't get quite the accuracy with a whisker as you would like a fall away but its darn close. It's nice to have your arrow secured by the rest like a whisker does. Its all in preference really.
Personally, I like the QAD Ultrarest. Best of both worlds when it comes to arrow containment and drop away accuracy. Pricey though.