I like the series and I'm not at all sorry that I bought the book. However ... an earlier reviewer has already referred to the poor proof reading. Now I am an almost complete beginner in Japanese, but it wasn't ten minutes before I started finding lots of mistakes. It would be silly to list them, but sometimes labels are quite wrong; in one case two pictures side-by-side have been given the same caption by mistake. You might take the view that a dozen or so mistakes in a thousand is not too bad a failure rate. You might, on the other hand, like to look at Marlene Goodman's 'Let's Learn Japanese Picture Dictionary' which has the same format. I've not yet received my copy of that (so can't vouch for its accuracy) but I understand that it also gives the kanji. You may find that useful.
If you are completely new to the series, it is perhaps also worth saying that of course simple children's-story-book pictures do not in themselves make the language any easier. There is a trade-off: some people will find that the 'everything you can see here on the farm' approach is not a good way to learn ... it's obviously not at all systematic. Against that, lots of reviews (elsewhere) suggest that it works well for young children. It's cheap, cheerful, good fun - a way of adding vocabulary - worth buying, I think ... always providing that you can get by without the Japanese for 'hedgehog'!