Strengths: Lightweight, comfortable and does what they are supposed to do. I am size 7 UK but the ones I got were size 8 1/2 as they fit best. Feet breath nice and easy with them and they have a good width.
Weaknesses: Dont get them wet. As they breath easy the water can get in a little if you step in that slightly larger puddle, but nothing that will affect you too much. I wouldnt buy them online as with my experience a larger than normal size fits better. At least get measured up in a shop then buy online for the discount. A little expensive, but you get what you pay for.
Overall: A great shoe and one I expect i will be buying again. I did also buy the molded insoles you can purchase from some running shops and overall these fit my feet lovely. Highly recommend them. Cant comment on durability yet as only had them 3 months, but i am runnning 45km a week and no signs of wear yet.