We use nappy sacks for 3 kids, and then I treated myself with my last baby to a sanengenic bin, it was great, once it was full you empty it out, once you take off the lid then you can smell it bigtime, so recomend taking the whole bin out to do it!! We did use it lots upstairs as in the night it's easier and no nappys sitting anywhere, and downstairs used nappy sacks, but you get through loads so we leave them by the door, you don't want to be opening the door every 2 hours , my door wakes Devon up!!