I love this manga very much so I bought this sticker package after I saw the promotional mail.
It's really of high quality. The pictures are vivid. The style is very very cute.
The only problem is that I need more stickers. And there could be more commonly used stickers, especially joking stickers. For example: “I don't know”(滑稽 face), “Can't hold laughing”. Joking atmosphere is appeared very frequently in daily online chatting in ACG circles in China.
There is a very frequently used emoji in China: 滑稽 (I don't know how to speak it in English. Comical, or funny, interesting? ), which is used to express many complex emotion implicitly. It's like “←←”. I hope there could be such stickers. https://tieba.baidu.com/f?kw=%E6%BB%91%E7%A8%BD&ie=utf-8