The best one I found. I tried multiple app, including app from Microsoft shop. I needed a quick solution and this was easy to add, easy to create account, log in and absolutely stunning speed when connecting to first location on the list.

all servers dead

Gut vpn

Recently unable to connect in China

Very Good

Unable to connect, unable to connect for a while, please refund if not resolved。
This has been the case for half a month,now all servers down in China

I will give 5 stars some months ago, but now i will only get a low rating.
Now there are 5 free serves only, and no one can be connected secussefully. So now this add-ons is not free anymore