Project Management Tool

I just explored a new project management and tracking tool called Basecamp designed by 37signals and I am ready switch from my present tool. The functions are so self evident and the interface does not comes in the way of doing things. The only drawback is that the tool has been designed from the perspective of an individual user and not company usage where it may be used and administrated in a group. I am sure the 37signals will be getting a lot of feedback from its happy customers and will make the changes in the next release.