I had a lovely experience here.
I had tried on the Conspiration Pilote sunglasses at LV Ceasars the day before and was pretty sure that I wanted them. I was unable to return to Ceasars before I had to leave for the airport, so we walked across the street to Wynn instead - knowing there was an LV store there.
I was approached and helped immediately, and asked the saleswoman to please hold the sunglasses while I went to one other store down the way. Not only did she hold them but she went across the street during my absence to find me a brand new pair from another store, so as not to sell me the display pair.
She cleaned them and had them waiting for me when I returned 10 min later.
Perfection... and I am now the proud owner of what might be the worlds most pretentious pair of shades ever. ;-)