Thwe guillotines are very effective and kill very quickly! What's the difference between using them and a shotgun with 3" mags. at 20 yards, NOT MUCH! We're killing the animal, the quicker the better! The down side to the guillotines is that they aren't much good past about 20 or 25 yards and they are noisy when they fly.
A blind is great because you can sit with a buddy and get away with some movement. I range finder is also important because the vitals are small! I prefer mech. heads also, you need all the cut you can get!