Since my first air purifier broke down a year ago, I have been looking for an excellent substitute. I agree that the number of air purifier types that I can choose from isn't as huge because the number of gadgets and smartphones. (thank God it is not the case)
But nonetheless, it took me much pondering to make up my mind. I know from the beginning that I want a compact purifier, but I am split between GT50 and Holmes.
Phew... I eventually made my mind and this is the new air purifier that I've just bought recently. Since I've only played with it for a few days, I can't be 100% certain but I feel it was a great pick.