Overall, a great experience, the best day of our trip. Most things were awesome, some were just OK and a few things were lame.
Awesome: The driver, Ahmad was super nice. ATVs on the dunes (not the fenced in track) were fun and totally worth the money. The view at the end is beautiful. The shows were impressive with talented performers. The buffet style dinner they served exceeded expectations.
Just OK: Henna - they draw a little bit and if you want more, you have to pay. The camel ride works the same way. It's 1 minute on the camel and if you pay extra, the camel ride is 10 minutes. Sandboarding sounds good in theory but sand has lots of friction so you go real slow, if you can get moving at all.
Lame: People are constantly cross-selling you on everything - souvenirs, snacks, taking your picture then trying to sell it to you...I get that they're making a living but it's a bit annoying.
Super ultra mega lame: The falcon handlers get their own tier. It's a scam. They walk up to you all friendly, put the falcon on your shoulder without you asking then tell you the exorbitant price after the fact. Believe me when I say don't let them come near you.