I use BlackVPN with my iPad and it works really great. Streaming Video and Audio works without a hitch!
I do think that because of all the new BlackVPN accounts the available bandwidth has gone down a bit. I used speedtest on my 50/50Mbit Fiber connection and i only get 2-4Mb/s down and around 4Mb/s upload to the chicago speedtest server.
Since i only use it for iPad purposes it doesn’t bother me much and with the new dedicated iPad connections it won’t affect my ABC/NetFlix viewing pleasure.