I bought myself a pair of Nike free 4.0 a few weeks ago. I’m really happy with them, first flyknits I have and they are super comfortable. However, I expected them to be lighter (I have a pair of DC Shoes Heathrow which are lighter) and I don’t like the huge logo. I believe they’d look better with a smaller and well thought logo, because the pattern on the fabric is really cool.
Free Flyknit
DC Heathrow