worth (your/its) weight in gold

extremely useful or valuable.

User-friendly software is worth its weight in gold.

Experienced singers are worth their weight in gold because they bring strength to the choir.

Etymology: based on the idea that gold is the most valuable metal

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• knock some sense into
• knock some sense into someone
• knock something down
• knock something into shape
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• knock something's socks off
• knock spots off
• knock spots off someone
• knock spots off something
• knock the bottom out of
• knock the bottom out of something
• knock the daylights out of
• knock the daylights out of someone
• knock the living daylights out of
• knock the living daylights out of someone