People giving it bad ratings must not have mosquitos in their house
937149
I live in the tropics and got this at Costco in the bundle mentioned by other reviewers.

I have a serious mosquito problem in my house, especially after we host parties and people leave the doors open for more than 3 seconds.  This thing has been catching 20 mosquitos a night for me.  I've had it in my closet, in my kitchen just setting in my bedroom.  I leave it on all day and just move it around the house as I see fit.  It's a little bright to have on in the bedroom at night but I put it back there during the day and it still catches quite a few.

I couldn't be happier with this product and will probably purchase a few more.
67012
First used one of these in interior Alaska on a fishing trip.  I thought I had seen mosquitos in the lower 48 until I saw the Alaska swarms.  We were using straight 100% Deet too keep them off of us.  One of our guides had one of these Annoyers.  I had just showered and washed off the repellent.  Upon exiting the shower I was swarmed.  I asked the guide if I could use his annoyer because I wanted to test it.  As long as I sat still with the annoyer on the mosquito;s stayed about 4 feet all around me but did not land on me.  If I started moving very much I would begin to have them land on me again.  If you are in a hunting blind or just sitting they work pretty good.  If you are moving around - Not so Good.
949258
I am very pleased with this unit. We live in the country with about two acres around us, mosquitos had made it almost iimpossible to be outside
1498946
Hi, I'm a mosquito and I live in a shaded area of central Alabama. For many days I have terrorized the neighbors...well, technically my wife does the terrorizing...but I still like to hang out and enjoy the carnage. My family has been in this area for many generations, so you can imagine my surprise when one of the local humans purchased a great big nightlight for his backyard. Boy, that thing sure was bright.

Thankfully, I'm one of the smarter insects (hey, even if most of us are dumb, we still make up 98% of all animal life on this planet!). I sat back for a couple weeks and watched all of my moth and gnat friends hover around this light, only to be zapped into oblivion by some metallic grill that surrounds the light itself. I guess they're not too bright! Bright. Get it?

A few days later the primary male human attached some nice-smelling device to the bottom, but I wasn't going to be fooled. My gnat buddies all flocked to it, but I knew better. My family and I stood back and waited until just the right time to strike the humans, especially the little one who loved to play in the dirt. We bit him up nicely. Some of the time, he wasn't even covered in that harsh body spray, so that was the right time to strike.

We knew to ignore the light, and it was a good decision. And I just learned that the human tried to return the product to Amazon...but they wouldn't allow it! Apparently it's considered a hazardous material. I guess the store named "Amazon" is in cahoots with my friends who live in the eponymous river region. Or at least I'd like to think so.
1091775
I've used the Cutting Edge Pest Control Ultrasonic unit in my house for two weeks now and have not noticed any flies, mosquitoes, or spiders.  I'm especially glad to get any insect problems behind me as I have five grandchildren who take turns spending the weekend.  I don't want them to be bitten, and my pest control unit is taking care of that.  Thanks.
4092712
Recommended in Consumer Magazine as a mosquitos deterrent.  We used this in Canada where some of the most persistent mosquitos live and it works well, but you have to like the lemon scent that goes along with it.  Given the lesser of two evils, bring on the lemon.
837667
We moved to a more rural part of Chester County, PA with more land, .75 acre. We didn't anticipate the amount of bugs in the back yard while trying to enjoy the deck. With the amount of bug bits the family was getting, we were utilizing the deck as much. My daughter is very sensitive to mosquito bites.

I got fed up and did and impulse buy. Bought the 80-watt model, just prior to a large party we were having. I wasn't messing around. Taking account for the house, the back yard is about .5 acres. It made an immediate impact within 24 hours.

Out of the box, quite easy setup. Read the directions on how to place the attractant. I guessed, and guessed wrong. It was easy to fix, after reading.

I couldn't be more pleased about the performance of this unit. It quickly erraticated the mosquitos for the party and after a month-in, large decrease of beetles. They are still attracted to the deck light.

I have been running this 24/7 for a month and didn't see a noticeable increase in electric.

One thing I will note, isn't necessarily effective at cover the full .75 acres due to the house barrier, which is expected. But I certainly believe my neighbors are benefiting from it.

I'm considering buying a smaller unit for the front of the house to mount just away from our front door, replacing and outside light post, to provide protection for the front door. My house is a swinging door in the summer with the kids coming in and out.
682869
I work in the garden almost 24-7 -- it is my bread and butter business. I am an organic gardener so although I police my garden faithfully for any possible habitat I also live near a grove of trees, my little natural habitat as it were, and it is unavoidable - they will find you if you are outside in hot humid weather. For years I have used Off Clip-ons, because I can't stand bug sprays, especially ones with Deet. I have family in Minnesota where the mosquito is the state bird and they live soaked in deet all summer and it becomes very unhealthy I think. But with the continuing threat of West Nile Virus, you have to do something.

This year, there was a new varmint in town. A metallic blue-black mosquito I hadn't seen before. And its aggressive and not particularly bothered by the Off-Clip on. When one landed a huge bite on my jaw I decided to look for some supplemental help and found this product, which is Deet-free and based on geraniol (a derivative of geraniums). The fragrance is light and pleasant, so you don't mind slathering it on the critical areas - wrists, ankles, face and neck -- that an aggressive mosquito targets. And it works! Only for a couple of hours before you reapply, but then again, I'm usually coming inside for break at that point anyway.

I understand the negative regarding some kind of reaction -- those things happen with any product. But I don't understand the other violently negative reactions. I support natural solutions wherever possible. We've done enough harm to this planet. So I can only conclude that they must be chemically-dependent, or competitors LOL!

Give it a try and you probably will keep it in your arsenal. Goodness knows, in these times of global warming and wild weather, we need all the natural help we can get.
4136151
You will definitely hear it if you are close by. I would not install one next to a window unless it will be closed.
If the floor around the unit is of a light color, you will see a ton of dead mosquitos in the morning. Some reviewers posted, by I'll reiterate, use the octanol, it makes a difference. And do not put next to where you will be, it does attract the mosquitos.

Every so often I blow away the dead mosquitos, they will accumulate at the grid. I do not thing it's anything wrong with the design, there are simply too many of them.

After killing 10k mosquitos, does it make a dent in the 10M mosquito population? Did it eliminate mosquitos from my yard? Probably not, but I eliminated 10k of them nevertheless.
I'm getting a second unit to make a 20k dent instead.

Finally, I did not see an increase in electricity, if you're concerned with that.
996386
I live on the Gulf coast and while the mosquitos are enough to keep you from spending much time outside, the yellow flies will make you refuse to leave the house at all. Everyday I would get at least 3 bites walking from my house to my car 20 feet away. After 2 days with the defender running, there was about 50 yellow flies and over 100 mosquitos in the net. It's been about 3 weeks now, and I'll come across 1 or 2 bitting bugs a day, and that's only if I spend half the day outside. We have lived here for about 5 years and this is the first time we have been able to get any use out of our yard. Last month I couldn't even cut the grass or hang laundry in shorts! I have read a bunch of reviews on here that say the defender only lasts 1 or 2 seasons, and if that turns out to be the case, I still think it's well worth the $300 every 1 or 2 years to be able to have full use of my yard!
2295400
It does not seem to attract mosquitos, but makes for a nice night light
1424729
Ok here goes the "Real Deal"....I bought this item about three months ago and purposely waited to write a review.  Mainly because the previous reviews are mixed and you may not get a good feel whether or not to buy one.

I knew I had to buy it mainly because my daughter has a bad reaction to the little boogers biting her and $400 was a small price to pay when you consider how much time and money I was spending on ER visits.

We live in Florida on a barrier island and as you can imagine have very many of those pesky buzzards flying around looking around for a place to eat.  We put our trap in the back yard because it's the closest to the woodsy area, we have an empty lot behind us full of vegetation.  After two weeks very few mosquitoes were caught, very disappointing actually when you consider the back yard is where I dare not travel unprotected!  But alas, I was bound and determined not to give up, did some more reading and made sure I had the right mosquitoes in our area for the attractant we were using and tried to move the unit to the front of the house were it is a little more open.  I figured maybe the breeze could help and positioned it to where the fumes would be blown across my yard and entrance.  Success!  I'm now catching them like crazy!  I would say when I change out the attractant and propane the basket is about 1/4 to 1/3 full of dead mosquitos.

Lessons learned:

1.  Don't let the whiners who are bothered by the fact you have to refill the propane tank or put in new attractants and occasionally purge the system with the c02 cartridges bother you when deciding to purchase.  Look, you don't get something for free nowadays, the idea of buying something and then being able to walk away with no upkeep is ludicrous.

2.  I should have made the effort to get the bigger model, I live on a 1/3 of an acre but I think the bigger model would have made more of an impact on the mosquito population.

3.  ***Most important**** Give the unit time to establish the area before judging its performance.  Another words, let it stay in one spot before moving it to see if it's the right place to leave it.

I hope this helps a lot of you in deciding, nothing is the fix-all, but honestly if I can make a dent in the reproductive system of the mosquitoes and keep them at bay most of the time I'll be happy.  Twenty or so dollars every 21 days is a very small price to pay when you are faced with being a prisoner in your own house.  Kids tend to go stir crazy a lot faster than adults!

Cheers, Chris
3668466
I have been using this product for my daughter for about a year now. I used it for myself on a recent trip to South America. We visited a site where mosquitoes were swarming us. My travel companions were covered in bites. I had zero.
1733973
It catches a lot of flying insects, but not mosquitos.  I've inspected the trap several times and I don't see any signs of mosquitos, which is what I bought this for.
2635158
What?  You've read the reviews on other products but don't believe them?  You too are so desperate for a product that rids your backyard of the mosquitos that make outdoor enjoyment almost impossible that you are willing to believe in this product?  Go ahead, try it for yourself if you don't need that $100 in your pocket.  If you need to rid your backyard of moths and other non-irritating insects then this is the product for you!
4315968
this is no good for the california mosquitos..used it in hunting trip me and my son .sorry but ino good.,im speaking for my experience with it
1841874
I bought this because the yard spray's seemed ineffective and my wife always complained about the evils of chemicals. This works very well and I'm sure it has decreased the mosquito population in my yard, however, not to the point where they are non existant. I can still get bug bites on a daily basis.

As others have mentioned compressed air will help keep it clean. After the first two nights it was completely encrusted w bugs. I brought my small air compressor out and after a couple blasts it was mostly bug free. Since then the bugs seems to fall off much easier. I can simply tap the outside cage a few times and most fall off on their own.

Others have also mentioned that it can be quite loud. I tried sleeping with my windows open the other night but the zapping sound was pretty distracting. I have it on a timer w remote so I can easily turn it off on nights that I don't run AC.