I cannot stress how good this product is at eliminating all smells even those that are almost impossible to get rid of such as certain substances that are not legal in all states we recently use this to move houses and got rid of all negative smells within one day of use it is very powerful and I do not recommend having any pets or anybody nearbyWorks great! Do not over useIt was easy to use. I'm sensitive to the ozone, but it was gone within a week.The addition of the UV light is excellent. I had one without the light and I like the addition of UV killing what ozone cannot.The construction is very sturdy and solid. I imagine it will last for thousands of treatments with proper care (as described in the instructions manual).It can fill a massive space with ozone so rooms in your house only need about an hour or so - again, refer to the instructions.Remember: remove people, plants, and pets! Find are probably alright as long as they are not the kind which surface to breathe.I've tested this on many smelly sources and it worked on everything. I have not tested cat urine, but I'm confident it works just as well.If you're treating a small object, place object in a bag, and wrap the bag around the front of the unit. Do *NOT* place the unit in the bag! It will heat up and shut off.My shoes were soaked and they dried with a mildew smell. I wrapped them up, placed the bag opening around the front of the unit, and gave it a 30 minute treatment. That was probably overkill (pun intended), but the smell was gone and has not returned.My mother smokes in her home and I've treated the rooms with delightful results. Even just visiting her house would leave your clothes smelling of smoke, but not anymore.Further, *insects* flee at the smell! You can "bug bomb" without a poison fog coating everything you own. If they run and live, great, if they stay and die, also great. I'm sure this would have the same effect for rodents, as well, but I haven't tested that, either. (I also want to test ozone on bed bugs!)These machines are *fantastic*! Very highly recommended.Do *NOT* inhale ozone! Having said that, one tends to enter a room before it becomes O2, again. The UV light adds an extra .. sharpness to the air. A bit of lingering ozone is not that bad: it stings the eyes a bit, but adding the UV charges the air differently and it causes a lingering sting in your lungs if you inhale too much. Again, do *NOT* inhale ozone! This is for impatient folks who rush in before it's clear so you know what to expect. If you have any lung issues, follow the warnings *expressly*!Ozone, O3, is 50% larger than O2 and will scar your lungs if you force yourself to inhale O3. There's *no* benefit to this. If you want to infuse your body with O3, then buy a device to infuse water and drink that.Good productIt works fast and is very strong, for the size. We have a cleaning Services and use on regular together rid of tuff smells.Good value for the moneyI will say make sure you leave the area you'll be using the cleaner in. After about 4 hours it's safe to go back in.