Gaiam stability balls are a great option for people who are in a reasonably good shape and want to make sure they remain fit.
Ranked in these QuestionsQuestion Ranking
Pro There are suitable sizes for most people
Everyone in the height range from 5 feet to 6.5 will be able to find a ball of suitable size.
Pro The surface of the ball has a good grip
The PVC plastic doesn't slip on the floor. And the ridges on the surface further facilitate good grip so you don't slip during the exercise.
Con Low weight support
The ball supports up to 300 lbs of weight. It might seem enough for fit people but it’s only natural to want a little bit of a headroom for safety and peace of mind.
Con There's some rubbery odor
Initially, the ball has a slight chemical odor that, fortunately, goes away after a while. Still, the first few weeks can be really unpleasant.