My firm is using this system and we are very happy!
It is intuitive and easy to use. It is very nice to duplicate projects, modify them and save them as templates to use as new projects as required. That saves a fair amount of time in getting a project fired up and in use.
Overall, this is an excellent tool for us and improves our productivity, organization, time & budget tracking/management, team discussions/notes and communications.
I bought the 'Enterprise' level of the UpStream offering. That includes priority support. I did have an issue right in the beginning that they quickly responded to. My issue was resolved and I must commend them for the rapid response!
The UpStream Project Manager system is just the right fit for our firm. I'm sure it is more than some teams/groups need and possibly not enough for others, but it is great for my small Website Development firm.
I look forward to seeing how the system continues to mature and grow over time.
Best regards to the entire UpStream Team and good luck to all of you looking for a project management solution!