There are some ups and downs with this mall...
Let's start with the bad...
The variety of shops are not amazing and most of the shops have rude service. Also, watch for the crowds, it can be crazy. There even are many people that try to sell you tickets to a show or give some samples.
Now the good...
This mall is perfect to spend a hour or two. There's a wax museum and throughout there are gondolas you can ride. The ambiance is perfect too! There are alive "statues" and music. The choice of restaurants are good too from high class restaurants to the fast food type. The mall is huge but not as big as the Forum Shops at Caesars Palace. There are many great picture spots here!
I'd say this is a cool place to check out if you are visiting. If your staying at the Venetian definitely check it out and the waterfall too. These shops are a good activity to check out and explore.