The overall build quality is good, the shark is a bit smaller in real life than it looks in the videos. It comes with two batteries and oddly the charger is a usb thumb drive, so you have to plug it into a computer or a usb wall wart.The part I don't like is that the battery lasts less than 30 minutes. To remove it and recharge it you have to unscrew four small phillips screws on the underside of the shark. I get that the battery compartment has to be watertight, but it's a major pain in the butt to unscrew, replace, rescrew the compartment closes all for 30 mins of play. The top half of the shark floats about the water, they really should have engineered it so the battery was in the fin and it could just pop off for quick replacement.It's a cute, one-off toy and my niece enjoyed it. It is VERY slow in the water and wasn't strong enough to combat the currents in the pool from the filter jets, so we had to turn the filter off. After that she had fun with it.This is much cuter in person and swims back and forth just like a shark - love it!I bought this for my 6 yr old for Christmas. It took us awhile to figure out that it had to be in the water to work which we actually figured out after coming back here and reading the reviews. It worked great and my shark loving son was having so much fun until the controller got wet ( not submerged) and quit working.I bought this product then sent it back thinking it doesn’t work, it turns out there’s a water sensor on it so if your hitting the controls on the remote and the shark isn’t moving it isn’t defective, just put it in water and it’ll work, pretty cool toyWe use this in the pool to play tag with the shark. It's been a blast. Keep in mind that the shark only works when it's in the water. It won't operate when it's out.Battery compartment on shark has no connectors for AAA batteries. Rechargeable batteries included but will no charge or operate the shark. Trying to charge a second battery that was inCluded to see if it will work. Bought for a Jaws themed party. Shark is useless at this moment. Not happy!!!My son loves this toy . It’s easy to use and perfect size . I was impressed how well it work, I was anticipating a failure of some sorts after the first few use. It’s still working and overall it work the price and cool toy .The charging wires broke after using it for less than a week .