Boingo Wireless

Pros: Network coverage of the airport was excellent

Cons: I incurred in hidden fees because of clauses they hid in their customer agreement.

Summary: I recently was double billed by Boingo for their WiFi service at Newark Liberty airport.
Their reason (I'd call it excuse) for this is that I used the service on my laptop and phone. Yes, I did - and I did because there is no mention anywhere about a single device limitation, except in the customer agreement - 4 pages down, as the single, plain and small text last line of article 12.
While legally this might be sound (but I still think a good lawyer could claim otherwise), this is an utterly unfair practice. Such a limitation can effectively double or triple the price of the connection for a traveler with a laptop and one or two smartphones, and should be written in large type on the account pricing page.
What I know is that they had me once, but not twice. They got 8 dollars more than due, and that's all they'll ever get again from me (apart from bad publicity, which I'll use every opportunity to make).