Killed 2 deer in 06 with the MX4's, they couldnt have performed better. Both were complete passthrus, the doe i shot made it maybe 60 yds thru some real thick stuff and the broadhead looked perfect afterwards, the buck i shot with the same broadhead and blades (didnt even sharpen them) 2 weeks later doubled up at a dead run maybe 80 yds after the shot, thrust me U could find hundreds of hunters w/ stories like these. killed my first buck and a doe with the old school 3 blades they work great as well. Switched to MX3s last year they shoot well but didnt get to take any shots. Bottom line is you cant go wrong with muzzys, just find out what shoots best and you wont have to worry about your broadheads anymore.