This place is a nice change of pace from your typical Vegas bar. Its downstairs from the Masquerade Village and can be hard to find.
Once you're downstairs, it looks like a genuine wine cellar. They've got jazz music playing and you can easily have a conversation in there. It's such a 180 from whats going on upstairs. They have a wine shop with a wide variety of wines by the bottle and of course a wine bar. I recommend getting a flight as their pours are very very very generous.
The bartenders are very friendly but also give you your space. Overall, its a nice hideaway and much better than that wine bar at Mandalay Bay.