DBRS

Does anyone know about DBRS (everything from quality of work, culture, prestige/respect compared to other financial fields)? Glassdoor reviews seem pretty negative, but I always take those with a grain of salt.

At this company, what are the better places to be (analyst in FIG or analyst in Structured ABS)?

How does an analyst position at DBRS compare to a Big 3 CRA? Although the name recognition may not be there, would it provide a more well-rounded experience/more responsibility? Would DBRS provide a greater experience due to the fact that they need to fight for deals with a stronger intensity than the Big 3?

Lastly, how is this experience for pre-MBA? How does it compare to Big 4 audit/Equity Research/IB (only because I'm more familiar with those fields due to their popularity on sites like this)?

Sorry for the large assortment of questions. Thanks for all of your help and insight!