I use it to connect my US VPS as well as trying to use it to connect to AirVPN but its been iffy lately there.
The theory is its lighter on resources than OpenVPN, a cleaner/smaller code base and it works on the principle the connection is assumed always up - so you don't get the firewall bouncing problems of OpenVPN when it has to re-connect. Its supposed to make it more stable on lossy networks as packet loss doesn't mean bringing down the connection and establishing the link again, though its not really been my experience.