(personal opinion) hmmmm Interesting but i think this is not going to cut it once you have stayed at one of their 7* hotels.. (Jumairah ) Good for budget holiday but staying in a Budget hotel in Dubai.... where everything is so lavish ....
I don't think any company include local taxes as this needs to be paid locally and can't be prepaid.
You should check whether these include taxes as dubai tourist tax can be sizeable
I got BA flights for £319 and Virgin for £322. Indirect flights with Turkish were £268. Great find, I just wish I had 3 friends :(