Studio is getting batter, but still missing some of the basic features of the regular projects/prototypes.
The fact you can't easily add members of the team to the project or even create a password for shared links. Makes Studio unusable from a company policy stand point. Also, I was able to just copy and past the full (not shared) link into another browser without being logging in and can see everything.
Until sharing is fixed I can't recommend using Studio to my team.