Not all brands nor material made from name brand manufacturers are quality.
also not all contractors use quality materials, So how do you know what products to buy?
A good start is to go to a local paint store that specializes in just Paint and ask what are the best products for where you are painting. After that ask your prospective contractors what products do they plan to use and do they show receipts.
Here ar Burke Painting We use quality materials for your project and show receipts so you can be sure that you are getting what you paid for.