Auditorium and Fractal are at the top of the list of the list of games that I should have bought but haven’t yet. Honestly, I’m not sure why I hadn’t bought them before now. Their normal price was decent and the demos were excellent. It’s moot now, because I snapped them up today after seeing Tesh (thanks Tesh!) mention that they are both 50% off.
Only issue I have is that you can’t buy both at once, you have to make two separate purchases. From the comments on their sale blog post it’s a technical issue that is being worked on.