I read the other reviews that said to size up and I am glad I did.  I bought a half size bigger than what I usually wear.  This is my first pair of Asics so I am not comparing them to other models but vs another popular brand I was wearing, these are great!  They have enough cushioning for me and I use them for HIIT workouts, mostly Insanity and all of Insanity's different versions.  They are wide enough in the toes and the heel has a lot of support that embraces your foot.  They also look great too.  The only minor downfall is that they do not breathe as much as my last pair, but that just means my feet are a little sweatier than usual but I can deal with that.  I shopped around a lot and I am very happy to have picked these!