Honestly, this game has been pretty bug-free for me ~50 hours in. I had my concerns going in, but it's waaay cleaner than Fallout 3 was (or Fallout NV, but that's just Obsidian being Obsidian). It even has less people/objects clipping into the wall/floor/ceiling and the physics engine seems more stable as well. So, I applaud their work in terms of QA, at least.