It's definitely 'playable'. I finished my first playthrough (in German, took me around 90h to get to the final scene) a couple of weeks ago, and I haven't had a real gamebreaker. Some stuff was annoying (I had quite a lot of crashes before one of the patches, don't remember which one it was, though), other things are minor, like floating flowers and things like that. I remember that I had to reload three or four times during quests because it was stuck, but to be honest, that happened with Skyrim, as well. So yeah, do play the game if you're as impatient as me! But heed Marvin's advice and save often

.
I finally started my 2nd playthrough today, in English this time (awesome voice acting, awesome music, awesome landscapes, awesome everything!). I just made it to Riverville. Took me about 3h, and no crash so far

.