I'd like to address a few of the points brought up in this discussion, and hopefully clear up some of the questions about what CQuartz Finest in particular can and can't do.
First and foremost, coatings do not protect against chips and deep scratches; that simply isn't a realistic expectation. Despite some products' claims of "9H" hardness or otherwise, coatings simply aren't thick or hard enough to stop a rock or other harsh debris from causing damage. Only paint protection film can protect against those sorts of things (within reason, that is).
That said, coatings can provide a degree of swirl protection -- but not to the extent that they are completely foolproof. One of the biggest benefits of a coating like CQuartz Finest is that it will release the vast majority of dirt and other contaminants easily, allowing a quick rinse (prior to a traditional two bucket wash) or properly performed rinseless wash to safely flush away whatever grime may stick to the finish. The key to getting the most out of any paint protection investment is the use of proper maintenance tools/products and good technique to keep from incurring swirls or other damage.
Of course, this does not mean that no contaminants will ever stick to a coated vehicle; road tar, brake dust, rail dust, and other more aggressive residues can still collect on the finish, requiring the use of a tar remover or iron remover to safely release them. On a vehicle with a traditional sealant or wax on its paint, these chemicals would strip the protection and require re-waxing or sealing once everything is clean. CQuartz, on the other hand, will not be adversely affected by maintenance chemicals (notably CarPro has a comprehensive line of products specifically designed to work with the coating for ease of use), leading to significant time (and, potentially, cost) savings.
Although CQuartz Finest comes backed by a 2-year warranty, we have seen many instances of the coating lasting significantly beyond the warranty period. This will be dependent upon the environmental conditions your vehicle encounters, how it is maintained, etc.
Hopefully this helps shed some light on the benefits and limitations of coatings; if there are any additional questions or concerns we can address please feel free to ask here, or contact CarPro USA directly.