Your review: The casters are VERY Heavy Duty. They alone are worth the $95, but the caster adapter legs are included with all the hardware. I would recommend buying the caster set even if you think you won't use them now. If you decide later to install them you will already have them in-case they become discontinued. Both the casters and adapter leg set are very high quality. I bought two sets. one for my tan bench and one set for my blue bench just to have on hand. The caster sets come with all the hardware needed to bolt them to the adapter legs.
Pros: Raises the bench up even higher and makes it easy to move the bench if needed. These benches are heavy and you won't regret buying these caster/leg sets. $95 gets you four legs and four casters with all the hardware included.
Cons: These are wheels so if you are pushing or pulling on an item on the bench the bench is going to move some. I set the wheels in rubber cups to eliminate this to some extent. If you just put two wheels one on each of the back legs it would eliminate this and still aid in moving the bench.