Before Lifesize Cloud, we used Apple Messages (iChat) for desktop video and chat. We are trying to get all our users to use Lifesize Cloud exclusively for these functions. However, the one piece that is missing and keeps users logged into Messages more than Lifesize is the ability to transfer files.
Although you can share content on your screen, you often want to provide the actual document to participants as a take-away. It is available in other chat clients, it would help to be available here.