Bests & Worsts Reviews from Amazon

I don't write many reviews and I prefer to read reviews from people who have used a product for a while but for this I need to make an exception. I can't speak for the longevity of the unit, I have only had it a couple days. The only way to describe it, is that this is nothing short of amazing. I bought this for bad pet smells, as in urine. It's a long story but I own a house that severely smelled of ammonia from dog urine, to the point where you couldn't breathe. It not only took care of the urine smell, it also took out the stale smell from smoking cigarettes. I have tried all kinds of chemical treatments for pet urine and nothing has worked like this. This house is probably going to take several treatments but the improvement in just a couple is absolutely amazing. You can't imagine how bad it was. I don't have asthma but I now know how someone with it feels. Yes, ozone smells different and it lingers for a little bit but it goes away quickly, 90% in a few hours and the rest in a day. I have not used it in the worst part of the house yet, as I have to pull up carpet, but the results so far give me faith that the house is salvageable. If something changes, I will update but at this point, all I can say is "Wow".