In the late-nineties all the kids had one: a keychain-egg with a pixelated pet. Lots of people liked it.
After you have given your Tamagotchi a name, you can pamper it with food, furniture, music, clothes et cetera. But you won't get all that for free, you have to do something for them. Setting up a dentist office for example. With the stylus you can choose a drill to make a hole, and then you have to pick the right color for the filling to fill it all up again. You can start a tailoring shop as well, where you will have to do little missions like ironing shirts with your stylus. These kind of tasks will have to be repeated about ten thousand times to get all the little shops and stuff for your Tamagotchi.
The visualisation and music are truly amazing, but it isn't enough because behind the cute look hides a dreadfully boring game. Just like the original Tamagotchi.