Before moving, I compared dozens of long distance movers in the area - Monster Movers prices were a bit lower than two other highly regarded full service movers in the Boston-area and they really impressed me at the on-site quote so the were hired.
I used Monster Movers for two moves - a personal move from Westborough, MA to Port Chester, NY and another for by office ( Cambridge to NYC). Both moves were given on-site estimates ahead of time and both were within 2% of the estimate. Monster Movers estimate forms were pretty simple as compared to other movers where there were 5+ line items of charges. The crew for both my apartment move in Wesborough and the office move in Cambridge were the same guys who offloaded in NY the next day. Overall the quality of the entire move was just as I expected. Also, kudos to the office staff that called me every three days to see if I was ready to book - I probably spoke to Charlie about 9 times before my move.