My first pair of hiking boots were Keens.
I will first say that I loved the comfort and fit of the boot.
However, that style of Keen boot like this one used cloth grommets for the boot laces. For serious hikers (especially people attempting multi-week hikes) the cloth grommet design is unacceptably prone to failure. The normal process of cinching a boot _will_ cause failure over time with this design.
Again, big props to Keen for their comfort. They make other boots with proper metal grommets if you need a durable pair of hiking boots.
If you do mostly day hikes, and only a few times a year, these boots will probably serve your needs for a few years.
My background - typically I work in wilderness areas for 4-8 month periods, and range between 1,000 and 3,000 miles of hiking in a work season. (edit: I don't know if I'm also supposed to disclose that I do Q/A testing for various outdoor gear manufacturers. Keen is not one of the brands that I have been given products by. I bought my own Keens and returned them through REI.)