I normally buy Glade aerosol sprays for air freshening, and they work great for me; Oust is at least twice more expensive, so I hardly ever considered trying it: why spend more when you've got something cheaper that is very good? However, a friend of mine insisted that Oust sprays are "stronger, " so I eventually decided to try one.
I picked the Outdoor scent. My results with it are the following: 1) General air re-freshening - good: pleasant clean air; 2) Bathroom - okay: quick odor elimination, not strong enough fragrance; 3) Cat litterbox - good: quick odor control, but repeated use is required.
Overall, I would say that Oust Air Sanitizer is a good product, but not really any better than Glade, so the price difference is not justified, in my opinion. It lasted me about the same time, too: a little over a month.