Just my experience after living there for 4 years, not focusing on opening / operating business there much.
UAE itself is quite a nice place., you obviously enjoy tax free income, safety and nice weather for roughly 8 months before it gets unbearable hot (atleast for me), if you have the funds you can have a nice and comfortable life in UAE. However you still need to find your way around there to not get sucked up in the (in my opinion) stupid expat lifestyle which includes all these overpriced brunchs and dinners, there are new fancy and super cool locations everywhere which serve you︀ the same s**t just presented differently. People in UAE are in general friendly but personally︁ I think the expat community is straight cancer. Almost everything is centered about money and︂ people tend to evaluate how useful you might be for them in the future.
My advice, try mingle with emiratis because wasta is even more important than money in UAE.︃ Its not that hard to get in touch with locals unless you are totally socially︄ akward and ignorant. If you know the right people life will get even more comfortable.︅ However keep in mind what HKS said, its still an islamic country and things can︆ get outta hand pretty quick for nothing or a stupid mistake.
Don't think about doing︇ business there, most of the people you will meet think they are the smartest person︈ ever yet they have no substance nor a real skillset. Doing business with emiratis can︉ work, but it's a pain in the a*s quite often unless you are used to︊ GCC mentality, things can take forever.
If you optimize your lifestyle you can get around︋ quite cheap and save plenty of money. For example don't buy luxury goods in UAE,︌ better to save up your money take a trip to Europe, its often cheaper there︍ and you can get a tax refund. Get you some friends travel and ask them︎ if they can get you something from Duty Free (For example alcohol, Cigars or cigarettes)️ , like mentioned before if you know the right people they can even access duty free.
In the end, don't be dependent too much on UAE, don't park too much money there, always be prepared to leave in a short period of time and have a backup plan. Dubai may be dependant upon expats but on the other hand you might never know what will happen in the future.