I set up Ooma four months ago. I was impressed with the excellent clear installation instructions. And there's an online board which I like reading.
I have two older Panasonic cordless phones which work just fine with Ooma. I expect to recoup the outlay in 12 months.
Porting was easy and again, well explained
US calls included; Canada - $ 0.014 or a plan ...
Sylvia
formerly AT&T, California, Comcast cable internet