Ooma
Charges international rates higher than stated on their web site, charges for incomplete phone calls (1-2 seconds calls)
Ooma behaves in the best traditions of the worst calling cards. It makes you buy a prepaid account, puts wrong rates on their web site, charges you for incomplete phone calls (no answer) and when you call them and ask WTF they say the calls are valid and lasted from 6 to 8 minutes!!! That's for two ...