It's a great app, but the only thing that gives it 4 stars is the it is a little difficult to collect and use rare import parts and can't find anyone to help with that UPDATE: the updates for this game are ridiculous. I have a little over 5 gigs of free space and it still wants me to delete half of my apps for enough space. UPDATE: Worst support I have ever had to deal with. Contacted them and still waiting for them to get back to me. It's preventing me from advancing in my game.