The drug labs and junkies are actually Artificial Intelligence. The drug labs sell really cheap, and the junkies will buy at almost any price, up to an extent (this changes with location).

The game for a lot of people, seems difficult at first, and for experienced players, seems difficult again, when you have to save millions for the next upgrades. Once you learn certain strategies, the game is still a lot of fun, but as was said in the review, it’s not one of those play for a hour games. You hop on, make some price changes, buy a few things, and let it sit. The game still plays even if you have it closed out on your device.