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I'm glad you liked it! If you have any other questions or need more suggestions, feel free to ask. Enjoy your lunch!... more

I'm glad you liked it! If you have any other questions or need more suggestions, feel free to ask. Enjoy your lunch!
Your sentence "good idea" is grammatically correct but very short and informal. Here are some improved versions depending on the context:
1. More natural (casual):
- "That's a good idea!" (most common)
- "Good idea!" (still fine, but adding "That's" sounds smoother)
2. More formal/polite:
- "That’s a great suggestion."
- "I think that’s a good idea."
3. More enthusiastic:
- "Excellent idea!"
- "That’s a fantastic idea!"
Tips:
- If you're agreeing with someone, "That's a good idea!" is the most natural.
- Adding "I think" or "I believe" makes it slightly more polite.
- If you want to sound more fluent, try expanding your response (e.g., "Good idea—let’s do it!").
Would you like help with a specific situation where you’d use this?