In my opinion, a good team of a project can be considered a good team when they meet at least these criteria:
1. They are professional on their fields
2. They have experienced to do similar case projects or others with certain experiences.
3. They have a good track record previously to ensure us as the investors that they are real, not scammers.
I think those three criteria will really help us to pick the project and believe on the team.
I would add that most of the team should be public people. That is, they should have active profiles in social networks (at least in Linkedin and Facebook), created not a month before the announcement of the project.