I don't think it's so bad that you can't have a fine, functioning fortress. You may want to have the game save more often in the case of a crash*, but other than that it seems to be mostly okay, with perhaps just a few minor bugs that I haven't even really noticed.

But then, I guess it's probably a good idea to wait at least for the first patch for something as big as this, especially if it turns out that the save files become incompatible in the process of the bug fixing, or opening an old map in the new version doesn't fix the bugs.



*I've had one so far, right after some FUN came out of the truly massive cave system I dug into perhaps too quickly.