Great option for business or pleasure
I have had the opportunity to stay at the Madison three times within the past two months for business. I would certainly recommend this hotel when traveling for business or pleasure. The hotel is a good choice for several reasons. First, the location is downtown and close walking distance to the main tourist sites. There are two restaurants onsite that offer excellent food. The quality of room service specifically has exceeded my expectations (preparation and delivery time always excellent). The rooms are very comfortable with quality linens/bed, toiletries, and other small but pleasing touches like nice wine glasses, mini-bar, robes, Keurig coffee makers, and iPod clock/radios. Also onsite is a small but suitable fitness area (ellipticals, treadmills, free weights) and a business center (free to print boarding passes from the web) both open 24 hours. An issue I have had is with the free internet access in the hotel rooms. I have had trouble the past two stays connecting to their Wi-Fi and the front desk has not been able to address the technical issues. I would also not recommend paying extra for a room with a balcony (“Executive Terraces”). The city view is not spectacular and the balconies (they are all somewhat connected) have some chairs and a table; however, need some maintenance. The room itself was quite large with a sofa but really needed an extra table or something to make the extra space more useful. 
Overall I would and have absolutely been recommending the Madison to friends, family, and colleagues. The location, rates, and amenities all keep bringing me back. One last tip; if you are looking for food/beverage alternatives, there is a nice Whole Foods market close walking distance at 15th & P.