We replaced an older air purifier of a different brand with the Blue Pure 311+ Max based on research and the Consumer Report ratings. Thus far, we've been very pleased with it. Very easy to set up, and it is very quiet on the low-mid settings . We've not had to use the highest setting but did check it and even that, while audible, would not be too loud if we had a group over. I like the accessibility of the controls on top, and being able having one for night time which eliminates the lights. Also like having a choice of replacement filters and will try the allergen one next time.