I bought these for replacing the stock airbags that had failed in my '96 Lincoln Town Car. Hardest part was removing the existing bags. The instructions aren't bad, it's just harder to do on your back than one might think. I would strongly recommend getting a spring compressor (free to borrow at some auto parts stores, deposit at others), and i feel that this should be noted in the product description. Installation took about 2.5 hours by myself in the driveway.Ride quality is comparable to the stock bags and dramatically cheaper. If you're comfortable doing your own brake replacement, you should be able to do this project.