I have been using Bhoning blazer vanes exclusively since they hit the market and work exceptionally well for my set up
the way my arrows are set up there are no disadvantages
i get a more stable arrow at longer distance
maintains a higher rate of speed down range
which will reduce down range trajectory (flatter shooting arrow)

now if you are shooting Gawdy large diamiter broad heads that will double as boat sails I would recomen sticking the wholebird on the back of the arrow.