I love this VPN Service! Although I do wish it was free for premium; but that's unrealistic, for one thing. Another thing I have to say about this service is even the free they offer is not bad at all, and they at least offer a free version for those of us who are broker than jokes.

I can't speak for all the features or anything due to not having premium, but based on using the free version I can say a few things about it.
First thing I'll mention is the easy to use UI (User Interface) and overall clean, simplistic (but not basic), and easy to read/see. This I'm sure wouldn't be much different on premium.
Second I'll mention that I love the 500 free a month, I think that's more than fair.
Third and lastly for now that I can think of is all of the offers for extra free megs/gigs for free by Tweeting, etc...

Thanks! Highly suggested! 11/10