Shewe, the trade off for using a fast flight string is forgiveness. I have dryfired my old Exocet once and my new one five freaking times! Yeah, yeah, yeah I know I am a moron! With a fast flight string I would have done it once before buying new limbs. I personally don't think the extra fps is worth it but many do because it is very popular. I am thinking about using one but if I do then I would only use it when hunting (I don't seem to be a moron when I am hunting).