A cargo net came standard with my X-Trail, along with grocery-bag hangers and lots of tie-down points. But a couple of baskets are still handy for smaller things: one for stuff that stays in the car like a blanket, tarp, umbrella, booster cables, washer fluid, scraper, litre of oil and a few basic tools; another basket for stuff you need that day, like a cooler, change of clothes, jacket and any recreational gear you might want. I lined the bottom of the baskets with thin foam to keep them quiet, and bungie them to the cargo loops to keep them in place. Total cost: maybe $6.