adtran netvanta 2300

Has anyone had any experiences with this or similar products from adtran? I am thinking about going with this firewall instead of pix purely from a cost perspective. All I have ever used from adtran is tsu/dsu.

PIX are expensive but a far better firewall then i've ever used from any other manu.
they do everything that a real firewall should do!
i haven't used the other device that you mention.....sorry