OpenSoft ExpressMail

I am an ex-lurker of this mailing list that is not currently subscribed (so make sure I am in the To: or CC: list :). I wanted to ask the experts on the quality of OpenSoft ExpressMail and how it compares to competing products such as PGP for Personal Privacy in terms of security and algorithm's used ease of use, integration and installation interoperobility, compatibility and use of standards OS and e-mail platform availability export laws (OpenSoft's programming team is in Russia) etc. (is there something I should know?) If anybody has an opinion, or a pointer it would be greatly appreciated. Z