Pros
It's a strong company with a start-up mentality: I received a tremendous amount of experience in any and every area I was interested in, and I worked one and one with the designer and her team. It's growing: They are constantly trying to think of ways to give back and make their company more relevant to the market. My opinion mattered and led to new ideas. I read the other reviews below about it being unorganized and messy, which made me laugh a little bit. Would you rather work in a shuttered cubicle all day long and punch in and out with a timecard? I realize office environment is a preference but for me, working at Hadley Pollet gave me the freedom of working in a (gorgeous) collaborative space and an organic environment where I didn't feel like I'm was chained to a desk. Networking: Hadley Pollet is an incredibly well known company, and Hadley is very well respected in the design community and throughout Boston.
Cons
That they're headquartered in Boston and not NYC (for now?)!