In the last two years I've reviewed dozens of USB drives but this review stands out from the crowd because the four USB drives from PromoLocker that are the subject of this review feature a personalized design. PromoLocker is a US firm specialized in producing custom USB products for individuals, SMBs and large corporations, but they also have governmental and educational clients. The main gig of PromoLocker is custom USB drives, they entered this market in 2001 and build drives from the ground up.