I used  "Tur", as the babies called it,  In my Preschool swim lessons.
It swims great and the kids love to follow it.  They have to work hard to follow it.  It is fast. However, it seems to leak into the battery area and the batteries rust quickly.  Now it is not so strong even with new batteries. Lasted three weeks??+_  but great fun for three weeks.
Don't let it get near long hair!!!!! no fun!