Balloon rides are expensive no matter where in the world you do them. Serengeti Balloon Safaris are even more expensive, but they fly in the best balloons, with the best pilots in the best location in the world. You could never take a better balloon ride.
Expensive, but a once in a lifetime experience. You must do this.
There are some negatives. The animals seem to be scared of the balloons. So you don't get to see normal animal behaviour when you fly by. But every single animal below can be seen because they are all moving away from the balloons.