Dyson alien fan...

The i button on the remote toggles through a bunch of particulate readings (NOx, CO, humidity, pollen!) for free, this thing rocks! We had it in our bedroom last night running in night mode (silent and dimmed display) and the room really did smell fresher. Still wouldnt pay $400 for it. and I fixed the clicking oscillation too: The track bearing (big white circular roller bearing on the bottom) has a raised lip on the top of it that needs to fit in a receiver slot so its centered and the gears will sit flush. It was not seated so the gears did not mesh properly. It has 5 bearings on the bottom 1 plastic and 4 sealed roller bearings. Again, over engineered expensive toy.