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How do you define "good"? ESD is a boring, complicated subject. It depends on your device. It depends on your environment. It depends on cost. It depends on whether you are concerned with circuit upsets only, or damage.
There are standards that you can look at (ANSI S20.20, for example).
Yes, exactly. The choice of ESD depends on your design.
Operating temperature, cost, operating voltage, dimensions ....
But to protect against shocks, what matters most is the level of protection. Level 1, Level 2, Level 3, Level 4. (The protection varies in these standards.)