I bought this as a gift for a huge Kuroko fan, and I'm really impressed with it. The box is a substantial size, and contains all the items described above. The tumbler is boxed and makes up about a third of the package. The Kuroko and Tetsuya pins come pinned to a blue branded card packaged in plastic, and the plush keychain and coin purse each come with a branded tag in clear plastic bags, so you can tell they're authentic merchandise. The playing cards come in a little cardboard box.
The only way this could be improved on would be if the Akibento box itself was packaged in bubblewrap or something. It arrived a little dirty and battered, with shipping labels stuck on it. That would be fine for a subscription box, but if you're buying a one-off box as a gift for someone else, it would be nice to have a clean, in-tact box.
Other than that it's a really fun gift, especially if you can get it with a discount, and I know the recipient will just love it.
