I think I am about halfway through and I dig it.
And checking in the steam workshop, it looks like there are already roughly 20 user generated maps. Some long, some short. Some good, some not so good.
If you type Shadowrun Returns Forum into your browser, the first option took me to a group that is pretty into the game.
There was a thread in there where a guy is rating each piece of user generated content as it comes out.
I will probably use his list of good vs bad when I am ready to give them a try.