Eastern whitetail hunter here. Used the original 100 gr 3-blades for 15 years. Killed everything from 60# does to 200# Iowa bucks.
Never taken a shot over 30 yards but practice with them out to 50. Bought some of the 4 blades a couple years ago. Fly very similar to the 3-blades from my bow, but I still hunt with the 3's.
There have been a few times when I thought I should have had a better blood trail, but that may have been before I started putting new blades in every year. Even if I don't shoot the blades, during a season, I replace them.
Don't see myself changing so I guess I'm a love 'em.