I needed a shoe that I could wear in the pool and shower area of our local swimming pool.  One of my criteria:  I had to be able to take the shoe off and put in on while I was in the pool.  I had previously bought a pair of water aerobics shoes that were supposed to slip on and off, and they didn't work at all.  These Mary Janes are perfect:  even though I had to go up half-a-size, the shoes fit very well; they're waterproof; the soles are nonskid; and the aqua color even goes with my bathing suit.

I do laps and deep water aerobics, so I don't actually wear this shoe while I'm exercising.  I don't think it would be a very good exercise shoe because of its weight.

I'm hoping that the shoes' unpleasant smell will eventually go away.

One packaging oddity:  a label came attached to one of the shoes with instructions on how to "avoid severe personal injury when riding escalators & moving walkways."  As far as I can tell, the warning has nothing to do with the shoes.