[sberder]

I wouldn't, I've used their filters and followed them from the very beginning. It is an inexpensive solution but comes with its own serious flaws. They're very noisy which doesn't really work well in rooms where you actually live. They also suffer from poor CADR (Clean Air Delivery Rate) as those fans were never designed to handle high pressure differentials (before/after filter) unless you run them at full speed which is noisy.

The project is interesting nonetheless, it helped demystifying purifiers and rectify the market prices in China (with other brands like Phillips and Xiaomi). Their new product for professional spaces is quite good.