Is Subscribe & Save worth it for diapers and toilet paper?

Usually yes for diapers; sometimes for toilet paper. Subscribe & Save is worth it when you actually use the item predictably, the subscription price beats your usual store price per unit, and you set the delivery interval conservatively so you do not overstock.

For diapers, it is often a good fit because usage is steady, sizes are predictable for a while, and running out is inconvenient. The main caution is that babies can size up suddenly, so avoid ordering too many boxes ahead.

For toilet paper, it depends more on price and storage. It is convenient and can be a good deal, but warehouse clubs, store brands, and sales can beat subscription pricing. Compare by price per roll only if roll sizes are similar; price per sheet is better when available.

Quick rule: subscribe only if the delivered price is at least 5–10% lower than what you normally pay, you can pause/cancel easily, and you will use the full quantity before your next shipment.