We have Ooma and love it. I think we also pay just over $5 per month. We never use it, but I wanted a "land-line" because occasionally our youngest would be left home alone, and she didn't have a cell phone. But, now we all have cell phones, so I'm not sure how long I'll keep Ooma. Now, I still do call the home phone when nobody will answer their cell phones!
Thankfully, nobody ever calls that line except us - not even robo-dialers!