It’s quite good and also I like that they largely support Linux. They have phone apps, browser extensions, desktop apps, and even CLIs. They also have downloadable configurations for OpenVPN and WireGuard if you want to go that route. They’ve also got what I assume are fairly basic features of most VPNs like kill switching, private DNS servers, etc.
Why would they be hostile to that idea? It allows you to run the VPN only on your browser instead of your entire system which is sometimes preferable.