I have been using true Dyson Purifier, Hot Cool for 4 weeks now, I have noticed the difference with myself personally when I wake up I dont feel as congested. The machine its self it attractive, doesnt take up much room but has great power to heat up my bedroom. I love the timer function, I can set it and it will auto turn off when needed. All in all I highly rate this new Dyson and recommend it to all my family and friends.