My husband and I stayed at the Nairobi Serena hotel for one night before leaving for a 1 week safari. We were on our honeymoon and the hotel upgraded us to a lovely suite on the ground floor- unprompted. The facilities were excellent, we had a small problem with the bathroom drain, but when we reported this someone from the maintenance department attended to it straight away.
The hotel is more suited to business travellers than holidaymakers and we felt a little underdressed at times.
The staff were very attentive and we had someone come to our room several times during the day to check if we were satisfied. We also received a complimentary bottle of champagne.