Using it since a couple of years. They never seem to be the bottleneck, but it is hard to test since I am too cheap to get anything else than the lowest bandwidth (30/30). I get 2.2MB/s down and a bit less up, which is about the same as I get without VPN.
The app is nice (at least on Linux), but for environments where it doesn't work they provide openvpn files.
The app is nice (at least on Linux), but for environments where it doesn't work they provide openvpn files.