I like Elements less for the food (although it is delicious) and more for the Martinis and atmosphere. We felt very welcomed and at home there, and our server was very helpful. The pastry chef/owner even came over to help us make our dessert selections!
I also loved the "Martini Card" which not only allows you to remember which martinis you've already ordered, but gives you the 12th one for free!
The food (and especially the desserts) are very special because the chefs take the time and care to try to make them a little healthier for the customers (using olive oil instead of butter, allowing the natural sweetness of in season fruit to sweeten the dish rather than processed sugar) all without being pretentious and showy about it. If you didn't ask, you would probably never know.
I definitely recommend reservations here. It's a fairly small place, and they do close a bit earlier than most other Vegas places. Although I had no trouble finding out that they closed at 9pm, and am rather confused as to why other reviewers didn't seem to notice.