tools for BGP

Hi, I am interested in commercial tools for managing BGP. I would be interested to hear which commercial tools BGP administrators recommend or like; and why they like them. I would be equally interested to learn which tools people don't like, and why. If people don't feel able to name tools, then I would still be grateful for a description of unhelpful features or an outline of why functionality is to limited. This should not require giving product names. Finally, I would be most interested if people think there are no commercial tools which are of much use. thanks in advance for your help.