I was a big fan of the Brooks addiction 7 but unfortunately they have stopped offering them. So I tried the "BEAST" the minute I put it on -- it just did not feel right-- but I decided to go for a run and test it that way. Once I finished running both my knees were hurting (which I never had this problem with the addiction 7). Now this problem could be because of my supination (for some people the opposite angle which is pronation) and this shoe is not made or designed to account for these problems. I did not have a heart to return it because I felt some poor soul would end up with a used shoe-- so I kept it in a hope that someday I might be able use it as a walking shoe. So I give it a 2 based on my own experience. Now I have tried the addiction 8 and it appears that even though in my opinion this is not as good as 7, however, it has been perporming well so far.