I am happy with my hot/cool/air purifier, it is in my kitchen and removes cooking smells fairly quickly, it also warms the room fast when on heat. If I had to pick a fault with it, then do not look at your smart meter when it’s switched on as it seems to cost 15 to 20 pence an hour to run dependant on the setting, but then again I have not had it on all day as yet, so not really expensive. It connects to your phone if you download the app, you can also connect it to your Alexa device if you wish.