Jaroslav's Best Place In Prague is great. Great communication prior, during, and following our stay. Travelled with my seven (7) year old son.
Great location; a 2-3 minute walk to the Charles bridge; a 15 minute walk to the Astronomical Clock and the old town square. We typically travel with a scooter for ease of travel / fun for my son, however, would recommend not bringing one to Prague due to cobbled-stone roads.
The accommodations were perfect. Queen sized bed in the main bedroom, and two bedrooms with one European style twin bed in each. The A/C worked great (travelled during summer). Bathroom and kitchen also very nice.
Other than not having a rooftop hot tub or pool :-), this place was great and we'll stay here every time we visit Prague. Cheers.