If your goal is to avoid anyone in your house seeing you are getting parcels, and are not concerned about RM opening the parcel, they are great.
If your concern is being caught by RM receiving nefarious goods, they are not. You still have to pay with card for it so you can be identified either way.
If your concern is being caught by RM receiving nefarious goods, they are not. You still have to pay with card for it so you can be identified either way.