It is smaller than the Tamagotchi Connections or the Uni, but larger than the nano, which makes it easier to hold. The shell is a masterpiece, and on the back, the device's internals are visible as it is transparent blue.
It has fewer characters than the later generations because they are shared between the Gen1/P1 and Gen2/P2, but it is the most classic and affordable Tamagotchi experience available in the market right now, at a price that is worth it without having to resort to buying used ones from other countries. I bought it because I had never played the Original Tamagotchi from 1997, and I am enjoying it a lot. The mini-games are not as difficult as in the Connections V4, which is a good thing since you don't have to feed it sweets to make it happy, risking it getting sick. The Tamagotchi is a bit more demanding than the Uni for this reason (although not unpleasant) - only when the egg hatches for the first time, while it is a baby (approx. 1 hour), it needs you to be there because it gets hungry within a few minutes.
I recommend it for both kids and adults. I will buy another one.