Yes it’s worth it! Gives a better shine and longer lasting protection. At least a year, or more. No one has provide any independently and scientifically tested proof of how long any product lasts. But longer than a wax (30 days) or a paint sealant (6 months to a year ( (when reapplied after 6 months). The finish should be as perfect and flawless as you can get it before applying.