I stayed here while in Nairobi for work. I checked the website beforehand and was not very impressed with the pictures, so I was not expecting much. Therefore, when I got to Heron Hotel, I thought surely there was a mistake.
The facade was elegant and the reception sophisticated with predominantly wood decor. My room was tastefully furnished, very clean and comfortable. There didn't appear to be any air conditioning, but the weather was cool when I visited, so that wasn't a problem. However, it might have been different during hotter weather.
My main problem with the room was the design of the shower, which led to a lot of water leaking onto the floor. It was not all a pretty sight after each shower time.
The restaurant food was delicious, though pretty expensive as hotel meals tend to be. The Heron Hotel is located in a quiet area of Nairobi, although the more vibrant downtown is a mere 15 minutes away by car. The fitness centre was not yet open when I stayed there, although I got to look at it and could see that it would be a great facility, with more space and equipment than the average hotel gym.
It is a good place to stay if you want a comfortable, quiet hotel, which is not too far from the buzz of the city centre. I would suggest however that the hotel gets itself a better website.