As far as I am concerned, the only choice is International Expeditions. You will get 5++++ star service. Safety & education is their moto. You will get Range Rovers where everyone can stand up and photograph. The othere companies have minivans with a small opening in the center where only a couple people can stand up. The vans are not equipped for the terrain. We went through rivers & mud and no one else could get to the areas we went to. We saw them off in the distance, where we were next to the action. We only went to Kenya. The hotels were amazing - Ritz Carlton level in the middle of no where! Honestly, how many times are you making this trip. It might be a little more pricey, but well worth it. Saftey is a huge issue! Don't miss the Elephant Orphange in Nairobi. Baby elephants put kittens to shame - you will never see anything more cute!