Excellent location, great service, beautiful hotel!
We travel a great deal in 4-5 stars hotel. Having said that we were very pleased to experience great, polite and efficient service at the Boston Park Plaza. 
You may get a smaller, older room or a newly renovated <double room> (They took 2 small ones to make 1 big one with a King bed. All was very nice.
Warning: Fridges are NOT included but if you ask they usually will bring you one free of charge. LIke I said, the service is quick and polite. It took no more than 15 min. to get. 
Second warning; check for cleaniness! I was unimpress by walking into our room to find the bathub dirty....I called and within 10 min. the bellman brought a new key for me to check another room. The room was much bigger with a huge bathroom. 
All in all, nothing's perfect but at the Plaza, no fuss!