VPN Setup Tutorial
You can connect to SaturnVPN servers through 5 protocols including PPTP, L2TP, Cisco AnyConnect VPN, OpenVPN, and Kerio VPN.
Depends on the country you are living in or the network, there is a possibility that some protocols are blocked by your internet provider. Or you experience slow connectivity, Or your connection disconnects after few minutes.So you should try all protocols to see which one works better for you.
For example in some countries like China some clients can not connect through PPTP and L2TP and they must use OpenVPN and Cisco AnyConnect VPN.