Windows 7, Intel system and at present time vpntunnel is running great. Very smalll drop, if any, in speed up/down. The connnection guard is great for uTorrent. I have done some testing with that and found no holes yet. I disabled IPV6 on my connections due to a security hole i was reading about using a vpn connection with PPTP while using bittorent, I don't believe it is really needed with OPENVPN but I didn't want to take any chances until I do some more research. All and all it is simple to use and thus far has been reliable.