Fitment is perfect! Very very light! The product quality is perfect as expected by Merrell... considering this is the second pair of shoes that I buy from them. I have used this pair for sprinting, tempo runs and some medium length runs. I am pretty confident that even for longer runs the cushioning will be enough. Having said this as always with barefoot(0 drop) and minimalist shoes you have to get used to them. You have to slowly increase the length of the runs, in order for the relevant muscles to get accustomed to the new reality. And not lease your running form has to be decent.... so I would say not a pair of shoes for beginners.