This is a great shoe. I've been running in Kantara's (I&II) for years, and find it allows me to put in more miles per week than virtually any other shoe. It's just a little heavy, but the weight is well worth the comfort and cushioning being a more "mature" runner. I did my first marathon in these shoes, and probably wouldn't have made my goal (under 4 hours) in a less comfortable shoe! I'm 48 years old, 6'2", 180 pounds, and normally run about 25 miles per week.