I know multiple people who worked / working at Mullvad and they take their business, security and privacy _very_ seriously. Not surprised to see them shine here.
Coincidentally, Mullvad, Windscribe and IVPN all worked when I was in China behind GFW, while more popular options did not. Seems like there are VPNs, and then there are VPNs.
Mullvad is pretty good overall though.