Staging. Does it work?

There are several strategies to sale a Las Vegas house but one I have never tried is staging. Does it work? How much does it usually cost?
We had an interior designer come to our Wednesday team Huddle to discuss staging. She mentioned that a Las Vegas Realtor could sell a home in a 1/3 less time by having their client's homes staged. Interesting information considering the current status of the market we in. Who has any insight to this? Do tell...