I’ve been used this service for more than 8 months. Very reliable & fast connection! Their US servers ALWAYS give 0ver 98 % of the original speed (100 % useully) according to the results I get at speedtest.net. Sometimes, I get over the max speed I’ve gotten with my bare connection via their VPN(Theoretically, is is possible?) The UK servers used to give only around 50 % of the original speed but recently they begin to also give almost 100%!
Unfortunately, like most VPN providers, they don’t tell us very much about who they are, but so don’t most VPN providers!(I think they should at least provide a support forum, though). So, it is certain that this is one of the best VPN providers you can get.