P2P. You'll never be on a level playing field and will always be trying to catch those that spend A LOT on the game. Addicting. You'll never catch anyone with a more powerful base unless you are willing to spend, a lot. If you get with a good alliance, you can develop some friendships (only reason I still play) and have some laughs. Does take a good amount of time commitment. Very little instruction so you'll ask lots of questions.