I’m not usually a fan of subscriptions as I’m on a limited fixed income (pension) but it’s most efficiently handled on all levels. I’m probably not saving money as such because I changed their tray every 3 days before so went through many bags but it’s not having to deal with the smell hitting me when I enter the house that gets my vote. It’s also much less messy. It’s a set and forget system apart from picking out the solids and swirling the tray. So easy and my cats transferred to using immediately.