DirectBuy is an enigma. You win in some areas and lose in others. For furnishings, cabinetry, flooring, tiles etc. DB is great. It gives you a one stop shopping opportunity that most large speciality stores do not give. One has to spend the time and effort to get the right stuff and patience - you need plenty of that. If you do not have any of the above, DB is not the right place for you.
I think that there is not much savings on certain electronics, windows, doors, countertops, shower stalls, furnace etc. ( all big ticket items) but get great deals on other exclusive items which generally are special orders for large stores. If the item is not a special order, then the large speciality stores give a better bargain.
Depends on what your future shopping list is. If it is windows, doors, building material etc - then you are at the wrong door. But if it is do with flooring, tiles, draperies, lighting, furniture items, faucets then DB is great.
Overall, my experience is bitter sweet. But nothing is perfect in this world. Nothing is gained ( savings on certain items)without a pain (upfront membership).