You almost always go first.
Benefit: Whenever you need to make an initiative check to determine initiative order, you automatically get a result of 20 + Dexterity modifier + all bonuses that add to initiative checks. If you make an initiative check for a purpose other than to determine initiative order, you roll normally.
Adventurer’s Handbook: Genius Guide Volume 1. Copyright 2010, Super Genius Games. Authors: Owen K.C. Stephens and Stan!