The pay wasn't great. Many of our peers working as RAs in other buildings had it worse though, so they attempted to organize. The Broad's management responded to this with blatant union busting tactics, including holding "not mandatory, but highly recommended" meetings where higher-ups showed us PowerPoints that had been designed by a third party (they would not give details about the company that designed these PowerPoints). Presumably the Broad paid a union busting company to make it and train supervisors/management during a four hour long closed meeting held shortly after the union went public. These PowerPoints had a clear objective—dissuading techs from signing their cards—and they towed the line of what was even legal.
The Broad Institute states on its Mission page, "We believe every Broadie — everyone who works in the Broad community... is an important part of our scientific mission." If they truly believed this, they would pay their researchers fairly. They would not engage in such obvious anti-worker tactics. They would treat the people doing the legwork for their groundbreaking science like human beings.