Some swear by the twisted shank climbers, I never wore them. I had straight shank and didn't see the need to change. They say they are more comfortable, maybe, but I believe it's a matter of what each person wants to wear. I guess the answer is if you feel better climbing in one style or the other go with what works for you. See if you can get a pair of Twisted shank and use them for a week before you buy a set.