Great running trainers. Started running in Jan 2016 and predictably began getting various injuries and niggles. Decided to change trainers and I chose these and i have not looked back. They are lightweight and incredibly comfy, no rubbing, chafing even after 26miles. The only chafing was in areas unmentionable :). I have completed two marathons in 2016 and my time is down to 3hrs 16mins. Aiming for sub 3hrs in 2017 and with these bad boys on, nothing can stop me. I use them for 5k and 10ks too but i want the cloudracers for those distances, hopefully santa brings me them :) . They may be slightly pricey but if you are serious about running then you got to get some serious gear, plus I reckon they will save you on physio bills. Some complain about stones getting caught in between the "clouds" but they are not designed for off road running. City running and hard tarmac are where they excel. Buy them you wont regret it!