To be honest, I really didn't think I would enjoy the show as much as I did. Loved it so much I saw it twice! She sang all her #1 hits in order from Vision of Love to her later "Honey" and "Heartbreaker" days. MC had costume changes, dancers and worked the stage like the diva she is.
She did start about 30-45 mins for both shows, maybe to make up for the traffic to get into Caesars Palace...because, there will be traffic.
There aren't really any bad seats in the house, first time I sat in rear orchestra and 2nd time sat on the Mezz level, luckily there was no one in front of us in the Mezz so we were able to watch with Mariah directly under us.
There will probably be people standing and dancing (possibly right in front of you) so be prepared for that.
I recommend the show if you have the chance because let's face it, even though you think you're not a Mariah fan, you WILL know all the words to her songs.