I've played CitiesXL 2012. It's the most generic, lukewarm, unexciting city-building game I've ever played, and it's crippled by technical problems that the devs have refused to fix for years now (awful single-threaded performance, memory leaks, and other performance issues). Don't bother.
If you're looking for a new city-builder to play, may I suggest the Anno series or Tropico series? Hell, the
Tropico 4 Collector's Bundle is on sale for only $9.99 right now. Do yourself a favor and buy that one instead. Tropico 4 is awesome.