I hope that this provides the information that prospective subscribers will need to evaluate the product in regards to its pros and cons.
Although I have to say I don't see many "pros" on the site, mostly just "cons". The site details various technical, operational, legal, and security/privacy "issues" (i.e. problems) with the Ooma approach, characterizing many as "fundamental errors in the plan... that cannot be fixed by engineers."
Mike points out one of the biggest ironies with the Ooma's claims.
They further claim that they are letting everyone have "the right to screen calls" and then define a system in which normal calls from an Ooma subscriber to a PSTN subscriber will have the Calling Line ID blocked, thus denying the PSTN subscriber this "inalienable right".
The site includes some interesting recommendations for using the service, including this tidbit:
Whenever placing a call over the Ooma network, begin the call with *82 to force the call through a "secure" Ooma Gateway and to include Calling Line ID so that your friends who screen their calls will answer.
Update: per the comment from Mike P to this post, the ooma-revealed.info site was taken down - a copy of the website is available for download here (per Markus Göbel's Tech News).