I cannot express enough how excellent my experience was at the Baltimore Royal Sonesta. I stayed there as part of a professional meeting, and I was met with nothing but courtesy, kindness, and attentiveness. The front desk staff assisted me, with especial initiative: check in early, check out late, etc. They went to extraordinary lengths to assist the peculiarly difficult arrival and departure flight arrangements that I made, and did so with a kind professionalism.
The concierge staff, especially, is expert at offering customized arrangements for your stay: offering informative suggestions of local activities and eateries, and much more.
The hotel itself radiates an elegant ambiance, with the finest arrangements attuned for that effect: a remarkable library brimming with leather-bound books hailing from all over the world (and some very uncommon first editions!). The facilities are always polished and clean, and the hotel staff clearly takes pride in the maintenance of their hotel.
The Explorer Lounge is a particular delight: with unique character, softly played live music (chiefly jazz), and a phenomenal range of Scotches, Cognacs, and Gins.
I would not choose to lodge at any other establishment when I visit Baltimore in the future.