I got one of these as a Christmas present. I have run in it a few times and found it to be extremely comfortable. Remember 2 or 3 weeks ago when the temperature was -4 with a -8 windchill? I used the N2S on my midweek club run and couldn't believe how warm I felt at the beginning of the run and how well my temperature was maintained as the pace increased. I guess it is an expensive bit of kit but something I wouldn't want to be without now. Just one thing - remember to tape up the old nips before starting out on a long run.