Keens are comfy and last forever - if you want a closed toe. I love my Keens, but I also love my Eccos! They are amazingly comfortable and have an open toe, so more air, plus they can show off a pretty pedicure.
I have a light blue pair that I got at least 10 years ago. I can throw them in the laundry and they look like new. Also have a nude/beige pair, purchased recently that I look forward to wearing this summer. Neutral color, so they should go with almost anything casual.

SR