Hi Elizabeth @wess77, Here is why I like the new SoClean 3 - larger bin for the mask, nice nightlight if you leave the cover open at night, easy to start the cleaning cycle manually or just let it go on it's preset timer when you close the lid, lastly they added a fresh air cycle that you can run after cleaning before you use the mask which supposedly gets rid of any smell.

I haven't looked into the SoClean air purifier but I think @sueinmn may have some good tips for what to look for in an air purifier. I have been thinking of getting one for my bedroom and possible one that can do most of my house but it hasn't reached the top of my todo list yet 🙂