Our 3-year-old loves this book. He got it less than a week ago and we're reading it every night twice (and we stop at twice because Mummy needs a bit of a change afterwards;)
The illustrations are wonderful, full of detail, colourful, realistic and cute. The text is simple and not too long so you can read the book in one go before going to bed (or at any other time, really).
This book's great gift for children who're either into transport in general or into trains, of course.
We'll definitely add the other books in the series into our Santa's list.