I bought one last summer and was pleased with it. As with all toys, eventually the novelty wears off. So I just dig it out when I have company (nieces, nephews) but they always get a kick out of it. Pros: dives reliably (beware of cheaper subs that require you to manually tweak the motors to accomplish diving), surfaces reliably (provided your batteries aren't dead and you didn't install the optional weights), steers reliably, is very easy to use, has a horizontal range of at least 24' (as big as my pool), uses four inexpensive AA batteries and one 9 volt. Cons: Controller should never be submerged (use it from the deck only), control is reportedly erratic at depths greater than 3.5 ft, red headlight is too dim to be useful, and it generally requires an adult to install new batteries because the cover is difficult to remove. Warning: never use this in any pool that is not clear and accessible: there will be occasions on which you will need to manually retrieve the sub from the bottom of the pool. 4 stars

I bought this submarine for my nephew's 5th birthday, and he loved it! He and my brother (his Dad) tried it out in the bathtub, and it maneuvered perfectly - diving, turning, surfacing. They then took it on their lake vacation and it worked great there too! My brother was so impressed, he declared it the best gift of the party, and HE wants one for HIS birthday, so the two of them can play together!!! (Boys will be boys, I guess!) 5 stars

My son loves this submarine! If the sub goes too deep, it doesn't react to the remote controller anymore. You should not stand IN a pool while you play with it.

I have a recommendation for you if you decide to purchase it - attach the controller to a lanyard or to a cord that will go around your child's neck so that if/when he drops it, it won't fall into the pool like ours did! I took some extra long ribbon and tied it to each side of the remote. If he drops it now, it will just hang there.

After each use, you need to open up the battery compartment and let anything wet dry out. We never take good care of our toys, and we are making a big effort to with this toy. All the kids line up for a turn with this toy! I'm purchasing another one for my nephew's Christmas present. 4 stars

I got this RC toy for my grandson to use in our above ground pool. I liked it because it had round edges and did not seem to pose a threat to the pool liner. The sub has lived up to my expectations. It is fun, works well, dives, surfaces and is entertaining. My grandson, his father and even I have had fun with this. Once it gets to about 3 ft the RC starts to faulter, which is probably a good thing to keep it from going too deep. 4 stars

This is the first water use R/C toy that has lasted more than a week. My son thinks it's cool. 4 stars