I didn't have any problems with my shoes slipping on wet surfaces like another reviewer did and they worked great (no slipping on the pool bottom) as long as I was running AGAINST the current in our fitness pool.  But I had to take them off when I was doing the swimming portion of my workout because otherwise the water pulled them off for me.  This was especially bad after only about a week of usage because after that I also was unable to fasten the strap tight enough to fit my foot properly,  I use them 6 days a week max, one hour in a fitness pool.  The insoles came out immediately as well, but it did not bother me to run in them without them.  I replaced them with Body Glove split toe shoes, MUCH happier now :-)