Starting in August, Best Buy is adding Dyson Demo Experiences — dedicated spaces that will let customers try out Dyson products. Around 90 Best Buy stores in the United States will feature the interactive sections. These store-within-a-store concepts will range in size, from 40 sq. ft. to about 400 sq. ft. There will also be an enhanced Dyson experience on BestBuy.com, according to the retailer.