We get it wrong when we start talking about size with respect to this project.
Is their selling point size? Is it cost? I guess not. Size and cost are mostly for lower level real estate market.
I think that their selling point is convenience, uniqueness and exclusivity. This is a mini-Tatu with the advantage of being close to the city centre. The uniqueness of being the pioneer in the residential skyscraper is a big plus too.
I believe they must have done their research. Expatriates, the rich(guys who wear 500k worth suits

) would not mind being part of this exclusive residence.
You can buy a coke soda 500ml at 60bob at a supermarket. The same soda will retail at 80bob in convenience shops located at petrol stations along highways. Is their product just the coke? NO! They're selling you the convenience!
But I still don't get why the higher one goes in the building the more costly the prices. I would prefer to live in the lower floors.