This is a great service that allows me to use Spotify when I'm not in the UK or Netflix and Hulu when I'm not in the US. I wish there was a Swedish option.
I have not experienced any disconnections or disruption in service. Speed is only very slightly affected.
I have experienced a minor bug. When the computer sleeps (Mac OS) and the VPN is connected, it seems to mess with my Airport's ability to figure out whether it is connected or not to the wireless upon waking. The easy solution is to remember to disconnect the VPN when not in use.
I find this is a GREAT service for the price and recommend it for anyone who is not familiar with the use of VPN services, because of the fairly straightforward way it installs and operates.