Product review (5 stars): Neat device, works well, fascinating info
So neat! I found my studio apartment recirculates the air without adding fresh air. My plants love it, but while I'm exhaling CO2 at night, CO2 levels increase to an unhealthy level. Wondering if that's adding to me not feeling well rested in the mornings.

The only thing better would be if it would keep a history that could be exported via USB (or wirelessly!) for charting over time, or if it could be integrated into a DIY environmental control system.

Yeah, the menus require the manual to make meaning out of the codes, but that was easy and a one-time setup thing. There's room for improvement but it's not a big deal.

For the price, no complaints!