At first, when I activated it, I was confused about Hutchison Hong Kong. They said it was okay to use it, and it was.
At first, the signal was really bad, but then I chatted with the admin, and finally, it was safe to use when I got home.
2 GB per day is enough for browsing maps and Instagram. If you don't spend much time outside, just buy a smaller one, since there's Wi-Fi.
I bought this package with JR, but it's not that cheap. The price is standard.