There aren't really any concrete reasons not to enjoy this. It's light and funny and a bit of a boy's own kind of adventure. The animals are funny and well described.

But. Everyone's annoying. Sometimes it veers away from funny and is just annoying. I couldn't stand Larry, to the point he was often not funny to me. It was dull in places.

I loved mum and Roger.

It was FINE. Certainly of its time in places though.