This is my second purchase of Mizuno Wave Creation 12.  I ran my first half marathon in my first pair.  Although these were the first running shoes I've ever had to break in, I have grown to love them. I probably could have avoided the many, many blisters and one lost toenail by listening to previous reviews.  These run small!  I let my vanity rule and only ordered half a size larger with my first pair, but I recommend going a full size larger (as I did this time around.)  Otherwise, I feel like I'm floating in these shoes.  I run about 20-25 miles per week mostly on asphalt and have no problems.  I am a neutral runner and have a narrow heel and wider toe base.  These shoes are the perfect fit for someone like me.