I'm glad they brought an IKEA to Vegas, I grew up with their furniture. Starting with the exterior, the parking lot is huge! The building and lot are very well laid out in a convenient location--directly off the 215 highway on Durango--so customers have no problem finding the store or a place to park.
Once you walk inside, the main bathrooms are directly in the front of the store (including many others thought the showroom), there is an abundance of carts, as well as an elevator right next to them, for convenience.
As you go upstairs to the showroom, the different areas are laid out as displays. They set up rooms as if it were in a home, showing the different styles of furniture. The showroom itself can get kind of crowded, even on a Wednesday morning, even with only 2 or 3 couples looking at the same displays.
There are arrows on the floor to follow, sort of like a trail, that takes you around the building to every furniture category and plenty of signage to direct customers to the desired areas.
My chief complaint would be the employees, or lack thereof. There seems to be only one employee for every large department and they're usually either helping a customer or need to be found. So, if you have a question, you may be waiting to get an answer.
The IKEA has a good sized food court and snack bar. Seeing as you could spend several hours in this store, they are definitely good additions.
In a nutshell: Great store, great selection and prices, very convenient, but hard to find assistance.