Avantages
I met a lot of intelligent people in the PS organization. The company still has good recognition in the industry, and offers great paid training. Despite of all its problems and challenges, Teradata is still a widely recognized leader in the industry and I bet that it might still offer some great career opportunities related to big data.
Inconvénients
My best guess is that they had been the undisputed industry leader for decades and then suddenly Hadoop "made the music stop". The PS organization had been under constant pressure and they clearly weren't meeting their goals. In any case, unless you are joining a division that works directly with big data, I would stay away from the company. Also, it's likely that someone like IBM will buy them, so do consider that you'll probably end up working for an even worse company in the future.