I have some medical issues with my feet and need shock absorption while walking in water to improve ankle and foot mobility with out having pressure on my great toe nails. They're great! They also give some resistance if I want to bicycle with a water belt on.

I use these shoes for my water arobics class.  They are great since they are easy to put on and off, adjust for the width, dry quickly, and work perfect in the pool.  The shoes come in generic sizes.  I purchased a M and I wear a women's 9.  I probably could have gone a size bigger since my toes are a little longer than the sole but they still work great.

Love this sandal for the water aerobic class I'm taking.  Since I have Parkinsons's Disease,  the placement of the buckle is impossible for me, but I am able to slip the sandal on and off with considerable effort.  If the buckle had been placed on the other side of each foot, I'd have rated it a five.

These shoes are  very comfortable.  Took a few trys to become used to the flotation.  Would not hesitate to recommend them.

Have an unusually deep foot.  The sizing seemed "spot on" width and length wise, but due to my unusually deep foot size, I  could not loosen the straps enough to get them to fit.  
Not a problem with the shoe however.

purchased the slippers for my husband to wear in pool for walking to exerise, as he is a senior and has bad knees. Very disappointed in them as they are so slick that he is unable to walk without slipping and going under water.