Good time killer. Very heavy farming. If you wanna speed through the game then you're better off spending money. If you rush your city Hall too fast and not level your units then you'll be heavily restricted to just fighting the rebels next to your city. Make sure you're gradually raising everything together. Essentially, f2p is a slow, casual kinda playthrough. P2w is speeding through to get to arena, ruins and territory battles. I wouldn't really advise spending money on this game, enjoy the grind, take it slow.