After having read some of the other comments, foremost it might be interesting to mention the following:
# on a Win7-64bit-system I hadn't a single crash and I alt-tabbed a lot
# I did NOT experience the often mentioned bug of workers staying idle, I suspect that it isn't a bug at all but a game mechanic which is described in the game: every citizen/worker has a certain time for work, for sleep and for getting all those necesseties of life like meat, tunics, olive-oil etc., additionally they have only a certain range of operation.
I had fun with the game.
The military side of the game you can either call underdeveleoped or, as many city-builders probably prefer it, not very important. Most of the campaign-scenarios don't include any military. In those that do, it adds a certain urgency and spice but you won't have the fun of really marching around your legions in any tactical or strategical sense.
What impressed me: The way the game introduces you to the various features and buildings is really well done, smooth and fun. Additionally excellent descriptions and really helpful hints and tips can be found at every start of a scenario.
If you like those city-building games, I guess, you'll have fun, too. CivCity:Rome is well made.