We spent about an hour up here taking in the sights around town and it was simply amazing. It's half the price of the high roller with a way better view. Also if you go right at 3 pm you can see the first fountain show at the Bellagio and also get the benefit of a reduced admission price. The top of the Eiffel is not very large, so it can get a little crowded at busier times, however crowds seem to rotate pretty often.
If you have a chance to take a tour with Verne, do it! He is awesome and the most gracious host. He challenges guests to ask any random fact about Vegas and he will give you an answer. He is quite knowledgeable about the Paris Eiffel Tower and Vegas in general. His presence was quite memorable and helped to make this experience more exciting.
There are a few helpful tips to keep in mind when visiting this attraction. Upon purchasing tickets, ask if they are offering any other specials. We were able to purchase High Roller tickets at the Eiffel Tower box office for only $15.00 as opposed to the higher priced ones being offered down the road. Also you can request an iPad which displays the current view of the real Eiffel in Paris France. It is cool to use, but looses its luster after the first 2 or 3 minutes. After that time frame, it just became dead weight. All in all, this has to be one of the best views in Vegas and is worth the fee of admission.