I like the ability to link my LinkedIn profile with the proposal so it's easy to see when people comment on something they're connected to! It would be great if there was more room in the email notifications (I have to click each message individually). The fact that everyone can edit their own copy makes things really fluid since different members of our group work off of varying versions or language needs at any given time. We use this software during negotiations - we've realized how important having all documents together can help us get through complicated deals quickly.