The first 2 episodes were done well in my opinion. They sparked a sad and interesting story about very different characters. It does slow exponentially from there, however.
For a series that short, episode 5 felt pointless although the helpers are my favourite characters. None of the plotlines seemed to resolve and none of the characters really grow.
The actors of the major characters did well capturing their stereotypes but the children felt like they were written by someone who had never met a child in real life (particularly Daisy, what an absolute nuisance). Hong Kong was nice to look at and they handled language differences well, but there were too many subplots for the short runtime.