Just wanted to chime in here, for those interested--I have two Hatchimals, and the first one's hatching was nearly identical to Aibo's: All was going well until the gears inside started making a strange grinding/stuttering sound after about an hour, and its pecking against the shell became weak. It also ended with me forcibly breaking the egg open after a couple of hours past that point, when I became fed up with it.
My second one, though, hatched perfectly. It started pecking at the egg after about 15 minutes, and 20 minutes later, it was out, all on its own. Quite a difference there. The first was the dragon version, while the second was the penguin...though based on reviews, it seems like the quality control in general for Hatchimals right now is not too strong.
Also, as fair warning, the different growth stages (baby, child, or what not--can't remember the exact names) are extremely short in length, which could be a little disappointing, but it does make it easy to simple reset and go through them again from the beginning multiple times. I'd say the whole growth process from baby to fully-grown only takes about an hour or so. In my case, since I don't like the full-grown stage as much as the middle stage (the middle stage makes more cooing-type sounds, which I prefer), this is actually a good thing, since I can just reset it and get back to my preferred stage over and over again, without having to wait too long. xD
Still very cute, despite the flaws, and if you're looking for something like a simple Furby and don't necessarily mind having to "help" during the hatching, I'd recommend them.