I wear these at work (I work in the operating room) and they are tight but comfortable. I needed a pair of work shoes that were waterproof, comfortable (on my feet 8-10 hours a day), and easy to clean.

The first day I wore them, they were very tight fit. The stitching at the ankle started to bother my heel after having them on for about 8 hours. They squeeze your feet, but the toe area was comfortable enough. Subsequently wearing them proved to be more comfortable after a relatively short break-in period.

One con is that they slip more than I'd hoped they would on wet surfaces. There is a shiny plastic coating that took a day or two to wear-off on the soles, and this gave me less traction initially on linoleum surfaces common in operating rooms.

I have found them adequate for my job, but would probably choose a different shoe in the future for the environment I work in.