Should I buy a brand-specific footprint or a universal one?

Brand-specific footprints (like the Marmot, Kelty, and North Face options here) are cut to match the exact tent floor and stake-out points, which buyers say makes setup cleaner. Universal sheets and polycro cut-to-fit options are cheaper and lighter but require you to trim and position them yourself so they don't extend past the rainfly and funnel water underneath.