These are lovely comfortable shoes - opt for half a size bigger than usual would be my advice. I did this and they are just ok. They are wonderfully light and you fly over the ground - but I'd say, based on my own experience, that these are 5K/10K shoes and no more. My feet were getting hot towards the end of the 10K I did in them and I keep them mostly for short distances. Lovely shoes though - no problems at all. Keep them for short distances and good weather!
These are a perfect running shoe. Lightweight, comfortable, perfect fit and great ease of movement. They are much more comfortable than my previous running shoe. Fit runs 0.5 of size small. This is because they are a barefoot running shoe. There is plenty of width space in the toe box, which i think is perfect for good foot posture. I love the colour and the fabric.