The Concierge at Nobu Hotel Las Vegas
Nobu Hotel at Caesars Palace's concierge is praised by professional reviewers writing for major publications. Out of 8 publications that we monitored, 2 referenced the concierge, like Fodor's and Oyster.
Nobu Hotel Las Vegas 
Fodor's
Oyster
Fodor's "Guests also enjoy a dedicated concierge, but the real perks are aimed at the stomach: priority reservations at the Nobu restaurant; an exclusive Nobu-crafted room-service menu; and a green-tea welcome gift"
Oyster "Guests get access to all of the Caesars features, such as the fitness center, spa, and PURE nightclub, as well as a private check-in desk and concierge services (though no separate lobby)"
