I've been using Ooma for several years. It's been perfect, and I highly recommend it.
Amazon had new ones yesterday for $118. I sure hope these prices are not a bad sign for the financial health of the company, but then again, I've been saying that since the day I first bought my Ooma box. I switched from Vonage to Ooma the day their $10/mo plan hit $16/mo, and overall I'd say Ooma has been better.