I purchased the buy 1
I purchased the buy 1 get 1 half-off and I've had both units running 24/7 for 3 weeks. The air in my house is so much better. You can really feel the difference. During the shipping process, one of my units stalled at a pick-up spot in GA. I called customer service on Friday at 5:30PM and a super nice person helped get the unit moving towards Kansas City. Amazing experience!