The always-on connection requirement isn't quite as welcome if you enjoy playing solo, though, as the lack of manual saving leads to some silly complications in single player. Most notably, every action you take is immediately irrevocable: there's no rewind button or grace period when placing a building. Normally, that's not a big deal, but if you accidentally lay a road too close to a hill, you may find yourself forced to bulldoze and rebuild it (at significant cost) to actually zone the area around it. More frustratingly, if you find yourself mis-clicking when attempting to place a building, you can find yourself making very expensive mistakes. If you place a very, very costly water treatment plant and immediately discover that it's a bit closer to your wealthy residences than you intended, there's no recourse, which can be frustrating if you value efficient play. (In the absence of manual saves, disabling your internet connection is the only way to test out a risky move before actually making it permanent, which isn't an outcome that anyone can describe as ideal.) And, of course, if the master server goes down, you're unable to play even single-player. Alt-tabbing out of the game for more than a few minutes will likewise often cause you to lose your sync and be forced to restart the client entirely.
For all these avoidable limitations, SimCity is still a gorgeous and often captivating strategy game. The ever-present tension between investing and saving is a constant presence as you play, and the numerous city specializations (oil drilling, ore collection, gambling, tourism, etc.) will help each city that you create feel different than the one before, and the design is smooth enough to encourage you to try your hand at multiple cities, both alone and with friends (or strangers) online. This isn't a radically different experience than what's come before, but considering SimCity's refined UI and mechanics, it's easy to consider this the best city-building strategy game to arrive in years.