I was on a leisure trip to (wonderful and captivating) Prague with my wife over the week-end prior to Easter 2013, and elected the Kinsky Gardens for the positive feedback it garnered over time on TripAdvisor.
I was thoroughly pleased with the quality of the hotel: location-wise it's brilliant, as it's far enough from the city centre buzz but close enough for the latter to be easily reached with a 10min walk or 5min tram ride. I found hotel staff to be competent, welcoming, helpful, friendly. While rooms are somewhat undersized for a 4*, they're very tidy and comfortable.
I can hardly find any reason why I would neither return nor recommend this hotel.