It's a relaxing little toy for drawing little european-style dreamy little towns. As you've very little control on the output and the grid tend to be a bit uneven, I do not reccomend it if you've even an hint of obsession for order and clean designs. In the current version there is a bug that for me make it hard to use as an occasional relaxation toy: the interface does interact badly with other controllers plugged in the computer (in my case saitek throttle and stick), making it impossible to use it until I unplug or disable them. Having to disable the devices and restart the computer before being able to play it, kind of defeat its role as a 5-minutes distraction tool. I've read of other people having this problem, it appeared with the last release, and hopefully it will be fixed, in the meantime, you've been warned.
Since I own this game (not on GOG, I bought it before it came here) I spent on this game about 2500 hours of gaming time, according to the platform timer. Sure, some of that time have been due to, for example, leaving the game open while I'm working or doing other stuff... but not so much. You care for your colonists, you grow your colony, and then see the AI storytellers throwing the slings and arrows of misfortune to your colony and cope with the aftermath. And when you grow bored of the standard game, there are the mods. So many, many mods. Ranging from the trivial to the ones so extensive to be practically different games, allowing to customize this game to your heart's desire. And they are easy to write and fully supported by the game designers, if you are into that. And when you grow bored with those... they release an expansion, that both expand the basic game, and gives to the modders more tools and options. Honestly, if I had to choose my "game to take on a desert island", this would be it.
The campaign behind the game is one of the better pen&paper adventure modules out there. It's massive in scope and depth and, according to what I've played till now (middle of second act) quite well implemented. Unfortunately the game is a "bugfest". While remaining mostly playable, the amounts of bugs in quests, rule implementations, balance and general "glitchiness" is quite high. Mind you, not especially more than most other games freshly published, the "1.0 is the new beta" seems to be an established practice today, Still, I suggest to anybody that want to go deep into the game and not play casually to wait a bit that at least the most egregious bugs get fixed.