Hey Dr Fish, yes the fauna is fantastic, there is nothing quite like driving along and having to give way to Elephants, Girafes and any number of other animals. It is very touristy but even so the Masai Maira is fantastic, almost garanteed to see Lion, cheeta, gazelle, elephant, girafe etc.
The local kids will all hit you up for pens and pencils, so I suggest you take a fair few, they realy do appreciate them.
Anyhow, have a great time.
All the best.
Mike.