http://vww6ybvd5x3echzddaoooo4bvmglpift26e4vagbarz4u5ttre2exvad.onion/en/vpn/security-issues
Specifically, it will protect your traffic between your device and the VPN gateway, preventing your ISP (or most governments) from performing a MiTM attack targeted toward you. However, once your traffic passes from the VPN gateway to its eventual destination, it becomes vulnerable to a MiTM attack.