Pros
RHMR is successful due to their sheer size. Their name recognition yields opportunity with many prospective clients and candidates who unfortunately don't know there are better options out there.
Cons
Having worked at other firms in the senior level contract finance and accounting industry, RHMR ranks by far my worst overall experience due to their transaction-based business model, lack of business ethics, and total focus on clients versus contractors. I lasted less than a year there -- could not stomach the culture management built that breeds mistrust, selfish behavior, infighting, and focuses on "what have you done for me lately". RHMR's reputation among career contractors is that this is a firm where one begrudgingly take a job out of desperation. Thus, RHMR places a lot of first-time contractors which explains their high fall-off rate.