In the first half of 2016, VPN.ac used to be my favorite VPN but recently I am not really satisified with the performance of the servers of any of the VPN servers when connecting from China Telecom. Currently, I am using ExpressVPN Hong Kong 3 / Hong Kong 4 and StrongVPN Hong Kong HKG302 as my main every day VPN connections (read more about which VPN servers are performing the best for me in China). If you are not as concerned as me with getting the best latency and download speeds or if you are using China Unicom then I highly recommend you try out VPN.ac. They have a 7 day money back guarantee so you can try it risk-free!
VPN.ac does offer great value for money and some excellent features. Almost all of the servers connect from China reliably, they allow up to 6 simultaneous connections, and have excellent customer support (although it's not 24/7).
In addition to the VPN, they also offer a browser proxy extension for Chrome and Firefox. You can think of it as a mini-VPN or a VPN within the browser. It connects very quickly (usually 1 second) and the connection is fast and stable. This is sometimes useful for me when I'm using Chinese websites (Taobao, Online Banking, etc) and I don't want to keep disconnecting and reconnecting to a VPN when I want to go back and forth between Chinese sites and overseas sites. I just open the Chinese sites in Internet Explorer and open international sites in Chrome with the browser proxy extension.
There is also a very nice unofficial and unadvertised feature of VPN.ac. Geo restricted video streaming sites such as BBC, Hulu, etc are unblocked automatically regardless of which server location you are connected to. You can connect to Hong Kong and still watch USA or UK geo-restricted streaming video. This works for most video streaming sites with the exception of Netflix. Check here for watching Netflix in China.
Recently, VPN.ac has finally introduced an iOS app. I plan to try it soon and I will update this page.
Tips for signing up with VPN.ac
Tips for VPN.ac users
Here are some of the FAQ from the VPN.ac website.