You can break away from grids a bit better than other city builders, but I am a bit disappointed in how it sets out the space around non-gridded roads. Sometimes you end up with a perfectly usable space, but other times when you think it's even better, you get a few awkward clumps of useable squares. Thankfully even a small space is capable of holding some sort of building.
Other than that, my only real complaint is how awkward it is to upgrade zones and roads. If it fits, it should just let me paint the new zone/road over the old one and be done with it. As it is, you lose a lot of buildings it you want to replace a road with one of the fancy new ones you've just unlocked.