No heel sag, enough cushioning for my mud/irregular rock and stone clusters, huge toe box, comfortable. What else can be? I ask about shoes? Some people complained that the laces were too long, so I expected to buy new ones. NO! Shoelaces are perfect, just long enough to tie tightly with a double knot. Learn to tie your shoelaces, noobs. Put them on and break my PR on a 4.5 mile stretch. Switching from the Brooks Ghost 9, which had a huge heel drop, was just crap for my running form. LOVE THESE SHOES!