This game is really really good. The concept is really nice, of course largely inspired by the good old SimCity but it brings everything to a whole new level (the dynamic water system is really amazing!).
I enjoyed the game a lot so far, had some troubles with a few details like inability to effectively ban the highrise buildings from emerging after some time (even if I put them in a district and apply highrise ban, they still upgrade to really tall buildings), or the problems with setting up a huge industry without clogging my traffic completely, but in the end I can say I'm rather happy with how the gameplay feels.
Unfortunately, I am not really happy with building models. I am constantly keeping my city zoomed out to the point where I can't see too many details because quite honestly, the models look too childish and plastic somehow. I wish there was more "grunge" and more organic feel to certain areas, especially the farmland and industry. Residential buildings look OK, while commercial ones are really weird and definitely overdone with banners and billboards.
I know, nothing is perfect, but I really wish there were more "earthly" buildings, like normal looking stadiums, huge industry zones that don't feel repetitive etc.
In the end, it will be a task of the modding community to bring us all these features, and knowing how awesome the SimCity4 modding community was, I'm really looking forward to seeing some graphic overhauls and many new industries, building models, props etc.
All in all, this game feels really good and considering it was done by a rather small team of people, I really appreciate all the hard work they've done. If they had more resources and more time, I'm sure they would've done much better, but that's why we will look forward to more expansions that will broaden the features of the game.