The way you use your van should guide your choice, as your routines and interests determine which products are worth considering. Start by considering whether the product suits the purpose you have in mind, from improving the vehicle to adding to your personal collection. This way, you can focus on items that match what you want from the purchase.
If the product needs to be fitted to your van, make sure it can be installed in a sensible position without interfering with movement or existing equipment so that it complements your setup. This ensures you can benefit from the addition without compromising the way you already use the van.