I purchased this reptile fogger in order to provide moisture and humidity for a Pacman frog's enclosure. It worked very well, I still have it but I have upgraded to a full misting assembly with a waterpump so it is not currently being used. However, I will say that I never had any issues with the unit and it functioned properly the entire 2 years that I used it. I'm sure it would still work whenever I have need of it again.From other reviews stating it doesnt work I can only imagine they received a defective unit or simply didnt follow the instructions. You must used distilled/purified water with the fogger in order to keep it functioning properly. You can set the amount of fog you would like play fussing around with the knob, and set it up to a humidity or temperature gauge to automate it. I did this and had mine working everyday for 2 years and it was exceptional.I moved away from the fog system itself and opted for a misting system because it retains humidity and water content in the enclosure better and without as much water usage, but the fogger still works well. It will boost humidity really high and then lower back down, and because its fog it wont saturate anything so the humidity wont stay consistent in my experience.It also looks great aesthetically when it is running in your enclosures, so you could also just get it for that.I used this with frogs so I didn't run into an issue with this, but I've heard you need to make sure your airflow is good enough to make sure the unit doesn't cause issues with your creatures wellbeing. Not everything can handle the fog and moisture in the air AFAIK. So do your research on your specific pet and if they can handle being fogged up.TLD;DR - Yes, it does work. If it isn't working your unit is defective or you have scummed up the system with improper water. You can automate it by hooking it up to a humidity gauge. It will give boosts in humidity but not really help in maintaining a consistent number or saturating the enclosure, so if you want that I would look into a misting system instead (They're more pricey). I recommend it for aesthetics or helping humidity when you are not home to make sure it doesnt get bone dry (Automating it).

I have read a number of reviews that were negative and wanted to leave my positive experiences over the last 6 years of having the fogger, I would recommend this with only limited reservations, or more specifically user notes (listed at the end of this review). I also have hard well water, so I use our RO water to fill the bottles.I have now owned four of them, two currently in use and two failed over time. I have each of them on a zoo med hygrotherm to control the humidity level, now for two enclosures. While they do not last forever, I have had them last a least 3 years each time. The fogger runs daily, but not constant.I have one enclosure at 80% humidity (poison dart frogs) with a 1 liter bottle, and one at 60% humidity (ball python) with a 2 liter bottle, and I live in Southern California where the humidity gets into the single digits on occasion. The units come on every half to 1 hour for awhile....something like that. It varies of course, but they are cycled quite a bit, and work consistently...i.e. I don't even think about them, other than to check water levels.The fogger will automatically shut off when there is not enough water. And refilling is easy. The top that screws onto the bottle uses a plunger to let water in, which nearly eliminates the chance of spilling water.There is a control knob to limit how much fog is put out, from basically off, to quite a bit.A half inch PVC pipe (I believe) can be used to extend the fogger pipe if needed, though it will only go so far. I use it to extend/stiffen the pipe to the enclosure.Limited reservations: basically, things to keep in mind for setup and useI have had one die within a week of receiving it, but was promptly replaced (just recently, and the next two bought have been working fine for 3 months now). My other two lasted at least three years each. This last one seemed to fail to turn off when the water ran out, or more specifically, not turn back on. I would suggest half filling the bottle a couple of times and let it run all the way down, and verify when it's refilled that it comes back on. I'm curious if this may be the early failures after a month or two. BTW, mine typically runs out before I refill it, so I think the issue is either there, or not when you get a new unit. 1 of 5 is not a great failure rate, but with Amazons return policy, it's not a big deal for me.I highly recommend a zoo med hygrotherm, its a little pricey, but controls the temp and humidity levels perfectly.Also, the reservoir is not very large, but the one liter bottle it comes with can be swapped for a standard soda 2 liter.Of note, the top that screws onto the bottle has a plunger to let water out. If you don't set the bottle reasonably straight down, the plunger can get cocked sideways and not let water out. Pulling the bottle back out, moving the plunger back over, and resetting it more straight eliminate this issue. I have one fogger that is almost arm length away from my access point, so placing the bottle back is a blind effort, but only a couple times a year do I end up cocking the plunger over.The unit does need to be fairly level, as the water level is very high in the reservoir...more of an issue when moving it, than when in place.The expanding pipe that comes with it is ridged, which can store water. If positioned incorrectly, the water could block the fog. Make sure water can run back down into the fogger, or into the enclosure....i.e. no dips.When it does start to burn out, it makes a bit of noise and little fog comes out...and stops intermittently. In a pinch until the new one arrives, it can be tapped a bit hard and it will run for awhile.