'Tis really free...
'Tis honestly free, as described..
I work for a bank in the City and have been trialling the service for a few months. There are one or two blind spots, but otherwise both the connection reliability and the speed have been pretty acceptable.
The session logout after a couple of hours is annoying though because it dosen't seem to check how much traffic is going over your connection - i.e. is it idle because you are in a meeting or are you in the middle of downloading a large file....other than that, ok.