Not much to say. It simply works. Simply intuitive UI. Nicely designed mechanism to switch countries and enable the VPN. And it works, which is the main point.
I haven't had the possibility to check whether the VPN costs me bandwidth. To be honest, I don't see any degradation.
Does what you expect it to do in a clean way. I enjoy it a lot the fact that I can have a browser window running a VPN, while the rest of the system is normal. I love it and the subscription price is good.