I use Ooma as well as my entire family. I have been using Ooma for 4-5 years now, I honestly don't understand why anyone would choose anything else... Ooma is AWESOME!! Seriously crystal clear calling, Always works, and all you pay for after the first year is taxes which are like 3 bucks a month.... it's a no brainer.... the only thing I will say is the dial tone is weird so my house alarm won't work with it.
Seriously, go get it, to hell with the other options, Ooma is the best!