Big Box to me is a home center.
Maybe you live in an area that does not have Flooring Speciality Stores that feature flooring and installation. Perhaps this one that has been in business for a "long" time is the place to start.
Installation is very critical, much more than the warranty on the product. Warranty on the product is very important when considering laminates.
If not, then you are at the mercy of your local stores.
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