These looked pretty neat. 100% of the motors worked. The toys are plagued with flaws. I used these for my daughter for 11 day (bath and pool). The motor kept falling off. After putting them back a few times, I broke 2 of the rotors. None of the boats are sealed. They allow water to get in both at the motor connection point and where the top and bottom meet. Some have other points where water can enter, like the clip in mirrors on the jet ski. Once you put them in water, the motor tips most of the boats back for the water to start making it's way in. I didn't have any fully sink, but they for sure weren't floating well.
These were nostalgic for sure. I had low expectations for this item and these surpassed them... In a negative way. I'm glad I have free returns. I remember having boats like this when I was a child and them lasting forever. Maybe they had lead paint and caused cancer in California, but they worked, floated and lasted