Pros
I was a survey administrator for QuanTech for a project they were working on which needed a set number of students to complete a survey. They gave me great guidance about who to try and speak with, how to network to find more, and were very quick to respond whenever I had questions.
Cons
There were no downsides to working with QuanTech, they sent me everything I needed promptly, answered all my questions, and were understanding when I needed more time to complete the assignment due to external constraints.