We were in the process of creating a Peer to Peer online sales platform similar to Etsy. We had big hopes for the project and many other Dev Firms simply ran away from the task. Rootstrap took it head on. Now we did not end up going with them for the full development of the platform for various reasons (these reasons had nothing to do with Rootstrap and more to do with the project itself), however, we had a 8 week discovery phase with them where we took a deep dive into what the platform needed. We had several interviews with potential users, we hade full workable prototypes, multiple storyboards and many other helpful documents. By the end of the 8 weeks we had a full packet of information that we could drop at any developer and say "Please make this".
The whole time I worked with them I never felt any pressure to carry out the full project with them. The dev team and the sales team I worked with genuinely cared the project and wanted the best for us, with or without them.