$10 a month just to forward calls from an old number? Why would I not just port that number to Google Voice, then forward my GV calls to my cell phone, all for a grand total of FREE?
Yep, this is a totally pointless product. It might've made sense a few years ago, but ever since Google Voice has been out, this has been possible for free.
The price might be a little high for what it's doing, but if the idea is to eventually phase out your landline number, this could be a good way of doing it.