I have over 10 jumps now on my new crossfire 149 and I have to say the openings are amazing on my Vampire 4! I've had one line twist but it flew out before i could even unzip my arms! With the couple of twists the parachute didn't dive out of control or anything, it remained in a semi straight stable path of flight. Overall the best parachute I have jumped to this day out of the ten previous ones i have flown. So if you have to go elliptical with your WS, get one of these!