This is a nice, classic boat with a sleek design and ample room for the two minifigures both in the cabin and on deck. The underwater element is very small but adds a nice detail for the divers to interact with. Personally, I’d prefer if it were at least double the size, though, which would only take about ten extra pieces. If you have extra sand, rock, and seaweed pieces (or can get to a LEGO store brick wall to get them!), I’d definitely recommend expanding it.
Despite the low piece count, there is quite a lot going on with this set, which facilitates play both on the boat and underwater. It’s a great set to play with at the beach, too, although there are a few small pieces that could float away. Having the divers actually dive is obviously the best part of this set, though, and you’re certainly not limited to the underwater element provided. Even if you can’t get to the beach, use a table as the water level for the boat (optionally with the water-themed playmat from the LEGO store) and a chair or floor as the ocean floor for the divers to explore. Add shells, deep sea monsters, or plants for seaweed and have fun!
The bulk of the yacht is a single piece, and the rest of the build, including the underwater element, is very straightforward. There are some stickers to contend with, however, and the long ones which go on the side of the yacht will require some finesse.
A significant amount of your $25 is going into the single hull piece, so don’t expect to be building anything other than a boat with these pieces, but if you like boats, this is a solid choice. You’re also getting a couple of nice minifigs with hair pieces and helmets and several accessories, such as camera, video camera, water bottle, and watermelon slices! The amount marine life is a nice inclusion, which certainly adds to the play value.