I stay in Nairobi, so my gf and I decided to get a couple nights rest somewhere else. We were at Boma the first night and regrettably Ole Sereni the second.
If I can compare the two, as they are both similar price range, fairly close (walk 10-15 min) and rated the same. The Boma is by far superior in services, amenities, cleanliness and the only reason I did not put 5 is that I found the pricing to be completely outrageous ($30 for a breakfast buffet... really...)
The room was big and beautiful, the bed was large and comfortable (not hard). They have large flat screen TV's, hook ups for your laptop (HDMI, Audio jacks etc). The bathroom was equipped with a double sink, large bathtub and separate large head shower with decent pressure. Although it was not always hot.
The pool was large though closes early.
We ate at the bar downstairs for dinner and breakfast. I must say it was absolutely delicious, may be one of the best burgers in Nairobi, their pizza was quite tasty also. This hotel deserves its rating.