I have been taking water aerobics class for 8 months now and didn't fall wearing my old 'rubber' soled water shoes.  I wore these Speedo Beach Runner shoes ONCE and fell on the pool deck, hitting my head on a metal pillar. The soles of these shoes are very slippery when wet.  The last step I took was like walking on ICE, no warning, just as if there was NOTHING under my feet to grip the wet tile surface. If you buy these shoes, only use them on sand or dry boardwalk.  Avoid restrooms if floor is wet.