Examples:

• They are natural, and they work like a charm.
• I'm sure it'll work like a charm.
• It's gonna work like a charm.
• New situations every day, time pressure, budget pressure: here, everything has to work like a charm.
• Right here on terra firma it will work like a charm if the Law-of-Attraction wishes you make are for soul growth. That, my dear students, is always granted.