Is Vegas a heaven?

When is the best time for me to go for a Vegas vacations?
Is there anybody can help me on this?

I was so unsure when is the right time for me to land in Vegas. I really want to know it because I was told that Vegas has it's own "timing" and it's own "attraction". I don't know what it mean. So can anybody clarify it?

Hey... Vegas is a heaven?
Come on... tell me more!!!