No really. I see the Obi202 for either the his/hers line, or a small SOHO. Currently I use my Obi202 to solve an interesting problem.* One of us in this household regularly forgets to hang up, meaning one can't reach us (sans remote answering machine). With the Obi202 there's an available phone to ring.
*Apparently this is common enough a company has come out with a dedicated device.