On the site of Penguin daughter Gütersloher Verlagshaus, the German publisher of Hallo!, a review was published by reviewer Yanthara. This is an English translation:

I find the book very beautiful. You join a family on the run and during their first time in a new country. The pictures are beautifully designed and the text is kept very short, so that you can read the book even with children under 2 years. Besides, the children also learn to count with the book, because 10 kindnesses are presented in the book. The book is also nice for older children, as the 10 kindnesses and the theme of escape also invite conversation.

Here is the complete review in German.