What does 'as good as it gets' mean?

[Oinas]

English Language Tests, Intermediate level

ESL/EFL Test #424 "English Slang Idioms (163)", question 9

"I went to Hawaii for a vacation and Hawaii is as ......... as it gets. Sun, beaches, warm weather, beautiful plants and warm water. What more could one ask for?" Linda said to Sean.

(a) good
(b) desirable
(c) warm
(d) sunny

English Language Tests, Intermediate level

ESL/EFL Test #424 "English Slang Idioms (163)", answer 9

"I went to Hawaii for a vacation and Hawaii is as good as it gets. Sun, beaches, warm weather, beautiful plants and warm water. What more could one ask for?" Linda said to Sean.

Correct answer: (a) good

Your answer was: correct
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Hi! Would you please explain what is the exact meaning of "as good as it gets"? Thank you in advance. By the way I think this is great web site to learn english!

[Beeesneees]

It simply means that nothing could surpass it. As a holiday destination 'Linda' feels that Hawaii is the best possible place to go.
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"Inside every old person is a young person wondering what happened."
Terry Pratchett