never had it so good! need urgent help!

hallo all of you !
i came across a strange structure in english that i could not understand its meaning in Vietnamese thus i''d like you to help me in dealing with it as follows:
-why do these dogs have it so good?
-we''ve never had it so good''
My question is what is the meaning of " have it so good " in Vietnamese" and how to use this structure.
Your help will be highly appreciated.
Thanks in advance
anhcuong-hp

Google it, mate.
From
http://www.allwords.com/word-have%20it%20out.html

idiom: have it so good
Note: usually with negatives
To have very many material benefits.