This certainly was a high quality hotel. The room I stayed in was tastefully decorated, spacious, clean and comfortable. I never heard any noise from neighbouring rooms (usually an issue in most other hotels).
The food in the restaurants was of the highest quality. The lobster and squid pizza was devine. The size of portions was generous. The bread basket was complementary and filled with at least 6 different types of freshly baked rolls. In the bar your first round of drinks is served with a generous tray of nibbles.
The hotel gym had a very good selection of equipment. The swimming pool is heated, and probably too much so (nice to relax in, but less good if you actually want to exercise).
If I had a criticism it would be with the waitresses in the Cin Cin bar. The waitresses appeared to have been hired for their beauty rather than their ability to serve customers. The waitresses wandered around doing their best to look glamorous, and deliberately avoided eye contact.
Generally the staff were friendly and helpful. There was one security guard who was a pleasure to see every morning; cheerful, huge smile and always welcoming.
The hotel is centrally located; opposite the National Theatre, the University, and the Kenyan Broadcasting company. The area is perfectly safe to walk around during the day, and only takes 10 minutes to get into the central business district. The downside of the central location is that if you are doing excusions, then you inevitably have to drive through the city rush hour traffic (crazy driving, slow moving traffic, and often heavy diesel pollution).
The hotel is expensive, but overall you get the feeling that it is worth the price.