Dissappointment
I have to say, regretfully that I was disappointed. An evening here, in an average, and very small room, cost $300. The cost, however, is certainly not out of line for a night in Boston. The location was great and the staff was very friendly and helpful. 
Gripes:
When I arrived, the room was stiflingly hot. 79 degrees and holy humid. I turned on the AC immediately. I spent an hour and a half in the room before I went out for the evening, and it was still stuffy and hot when I left. 
There was no fridge in the room. Really? Why not?
The most insulting bit was the bottled water..........A 16 oz bottle was $4 and the larger bottle was $6. After spending such a large amount of money on a "decent" room, I was truly annoyed and felt that I was being taken advantage of. I can accept paying for bottled water in a hotel, but this was a bit much. Aren't hotels in the customer service business anymore?
A $5 delivery charge for room service? As if I had another option. The menu prices were also quite high. I have stayed at other high end hotels in town and received far better value less for the stay and the room service.
Overall I was disappointed and felt as if The Onyx does not value their patrons. A fair price for a night in a 4 star hotel, sure, but I expected a lot more.
My advise to the Onyx: Show your guests some appreciation. Small gestures go a long way.
My advise to Guests: Bring you own water.