It´s really nonsense what some of the guys here is writing: "lack of lifetime account", "bandwidth max" and being shut out from your account completely for using too much bandwidth. More likely is it, that they came, didn´t bother to look and ran away again !
I have been using this extension for close to 6 months now. It is primarily used as a supplementary way of connecting safely, but while it´s still "just" a browser VPN. Just what I needed, and I have been in for a surprise; always really fast, connects effortless no matter to where and is incredibly stabile, just going on and on. I have actually tried getting a note after - not until AFTER - closing a session saying, that was to be considered my max for the day! I was well on the good side of 30gb. so I didn´t think anything of it. But that is the only time, and it´s happened since. Few days ago I went way beyond 50gb. - nothing but business as usual.
Consider this; I am logged on via a massive firewall, behind that a full scale VPN encrypting ALL of my network activity and finally from my browser via here. My connection is a delegated, but limited to exactly 100/100 Mbps. I am still able to pull more than 85% !
That alone should win most over, but throw in the smooth integrated leak prevention feature, and it doesn´t get much better !!

Nuff said ! :-)