I stayed at the Courtyard in Frederick off and on for two months while I was temporarily working in the Frederick area.
The service was excellent the entire time. If I ever had a request, it was handled immediately and with a smile. The staff at breakfast was great, day in and day out.
The hotel is an older hotel however it was recently renovated and everything is brand new. The lobby is beautiful, the gym is small (5-50lb weights, 2 treadmills, an elliptical, and a bike) but all equipment is new. The swimming pool and hot tub are indoors and relatively small but well kept. There is also a very nice area behind the hotel with a garden, fountain, fire pit, and seating.
The rooms are also very new. The ceilings are very high and makes the room feel huge.
I expected to switch hotels about halfway through my two month stay in Frederick (in order to get a change of scenery), however I knew that I would not be able to find anything better than the Courtyard. I'm very thankful to the staff for making my two months in Frederick relaxing and enjoyable, and would highly recommend the Courtyard Frederick to anyone considering a hotel in Frederick.