I've found their apps to be (subjectively) higher quality than most OpenVPN clients on platforms I care about (macOS, iOS, Windows). It's nice to have a consistent UI, and not have to think or care about specific profiles — it's easy for me to jump between servers much more easily (I typically connect relatively locally, but occasionally find that certain out IP addresses have been blacklisted from specific sites; it's trivial to "refresh" the connection to hop over to a different server and not have to think about it).

And, of course, easier (for me) to set up and configure. Maybe no _huge_ incentive to switch over to it if your setup works, but might be worth trying out if you're curious.