Ive been currently working on beating everyone of their games. I have beaten Edo towns and game dev and have just beaten this one. It had a slow start which almost made me delete it but once you get into it its really fun. People saying they are having trouble with the "rival malls" are just not saving and spending money wisely. I had everything thing unlocked including investments, buildings, etc and with a total of 42 million dollars by the end of the game and i never had gone under my budget. As long as you dont get a buy a stores at the beginning of the game like crazy you will be fine.
In conclusion, i would highly recommend this app if you played their other games and know what to expect. I wouldnt want to start their games with this one. I have a feeling people might get bored and quit.
Spanial about Mega Mall Story