I really want to like this game, and give it five stars, it deserves that. However, the lag is so destructive to the gameplay, I'm giving it one star. Definitely adding to favorites so I can check back for improvement.
If you only receive 2 stars with 100% cargo delivery, it means one or more of your trucks was not full. Cargo delivery means each time a worker left the warehouse, it was able to deliver to the truck, not that the truck was full.