Kenya is the East African powerhouse of the coffee world. Both in the cup, and the way they run their trade, everything is topnotch. The best Kenya coffees are not sold simply as generic AA or AB. They are specific auction lots sold to the highest bidder, and heated competition drives the prices sky high. Their research and development is unparalleled. Their quality control is meticulous, and many thousands of small farmers are highly educated in their agricultural practice --and rewarded -- for top level coffee.
In general, this is a bright coffee that lights up the palate from front to back. It is not for people who do not like acidity in coffee (acidity being the prized bright notes in the cup due to an interrelated set of chlorogenic acids). A great Kenya is complex, and has interesting fruit (berry, citrus) flavors, sometimes alternating with spice. Some are clean and bright, others have cherished winey flavors.