The Whisker Biscuit Rest is a very popular rest , especialy amonst Bowhunters. I do see some using them on the local 3D Courses but rarely see them on the National Tournament Circuit.
As long as you get a good quality rest ,be it what ever brand you choose ... just as long as your rest and your bow are properly tuned and your arrows are properly spined and setup proper you'll do fine... the rest of the shooting equaztion is all about you and your shooting form and ability to properly exucute the shot and judge the yardage corectly
Have a good time on the 3D Course