I had a pair, lasted about 3 months-kind of. I have another pair on order. I liked them.
The insole fell apart first, replaced it, but the replacements were shit - then a dog ate one. 3 months in my toe tore the inside lining. That and tons of wear on the sole - really time for replacement. They are comfortable and very light.
As for fit, the issue with me is the insole. If the insole is too small, you will feel the edge with your toes - and it will be annoying as hell. The insoles are shit - they like to shrink, but if you wear them they will stretch back to size. I had to wash the insole often, wash the shoes often. The shoe's work fine on my shoe dryer, but the insoles shrink like hell on it. Oh, the shoes stretch very easily. Drying them gets them back down to size.
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anyway, they are not perfect, but I liked them. Somewhat nicer than croc's - the other ultra light shoe I have worn for a length of time.