I love Keens; I find them comfortable with great support and not unbearably heavy.  This is my fourth pair but the first of this style.  I bought them because they're not as clunky-looking as my other beloved pairs and I can wear them when I'm dressing up just a bit.  They are comfortable, but I have very small feet and I find I walk out of these more easily than I would have thought; not the sandals to be wearing when I have to run for the train.