If I had to pick one place that I would take my friends visiting Vegas to, I would name Sweets Raku. And I actually did.
The experience here is exceptional. Starting with the famous edible menu, you get to see the pâtissier Mio at work in front of you from start to finish to prepare your meal. Yes I just said it a meal, you could just skip the dinner for the dessert here, it's that good!
Competitors? Practically none, but pâtissier at top-notch French restaurants like Joël Robuchon might be said comparable. At least personally I can't decide.
Also they recently began savory menu for lunch weekends, and as you might expect, those dishes are stellar as well.
Highly recommended would be an understatement - a must try!