Well, what I've found is that the younger Tamagotchi fans 10-12 enjoy them, but the older fans don't.
To me, the v5 feels less like a Tamagotchi. They shouldn't even label it "Tamagotchi Connection" because it doesn't connect with any other versions. Below are the pros and cons I found...
Pros:
~ Large Screen, new sounds, slightly improved graphics.
Cons:
~ Doesn't connect with anything but the v5.
~ You only care for the kids, the parents only show up as guest characters during feeding.
~ You only intereact with one of the Tamas on screen. That one plays games, goes to TamaTown and stuff on it's own. The "family" isn't involved at all.
~ At the Tama-Earth Expo, you have to enter and re-enter the passwords on you Tamagotchi each time you travel to a new zone, or play another game. It gets very old very fast.
~ When you have an item, it is almost always the same animation. The three kids line up infront of it, and happy music plays. Also gets old very fast.
~ The amount of points you earn from games does not coordinate with the price of items in the shops. Each time you play a game you get around 10-50 points. The items in the shops cost thousands, so you end up having to go online to the hectic Tama-Town deal to earn money, or you can cheat with fabricated passwords.
~ The new system called Bonding Percentage is difficult to raise. You have to change the time repededly go get it to rise at all, because the three items that raise pints are expensive and they only raise it 3 points. Binary has a great article that explains it all!
Hahaha, I didn't mean to bash the v5 or anything, but I hoped this helped. I think v5 is kinda a new apporach to Tamagotchis, but I don;t think it was a necessary one.