The question of whether it is a worthwhile thing to do is sort of subjective. It depends on what you intend the car to be used for, how much mechanical skill you have, and how much time you're willing to put into replacing them. Replacing bushings can be a really big job. Most of the time when a bushing goes bad even mechanics just replace the entire part now (like a control arm) because it's a pain to do and usually involves using a torch. Will stiffer bushings create better handling? Yes. Will they also make the ride "stiffer" so you feel more bumps on the road? Most likely.

I did that kind of job once and it's really a pain. It takes alot of time. Everything was rusted. You even discover new words that didn't know even existed. Changing the whole control arms is easier.

I had an older Volvo wagon year 1990 and replacing the bushings was a cake job! But on the newer ones like yousr I would do some you-tube searches. As inthedetails mentions it could be a really big job and even dangerous to do yourself.

Hey guys,

I'm not talking about replacing bushings. These are inserts that go into the bushings that are already there. They fill the air pockets/void of the original bushings, i.e. they are 'inserted'.