This is pretty funny. Go to the website and read the question and answers regarding odor. I have used road apples aka horse dung, in my garden for many years and after a day or two, there is no odor, not that there was much to start with. With this said, I believe this medium is more appropriate for out doors or green houses.
Well I can tell you that I brought a big plastic bag of fresh horse dung the day before yesterday to our balcony and there is NO odour whatsoever. Plus I already put some of it in one pot that is indoors with a sphagnum top dressing and it is completely odourless, so don't you worry.