The claim that this unit produces carbon dioxide (and hence ATTRACTS mosquitoes) is highly dubious. True, the units traps stray mosquitoes that venture near it. But so do other similar products that cost one-fifth of the price. Forget one-fourth acre, the unit is NOT effective over an area of 30 square meters in ideal conditions (operating at least two hours in complete ambient darkness without human presence). It certainly does not 'attract' mosquitoes, hence the claim that it produces carbon dioxide is suspect. It only traps stray mosquitoes that are attracted to it by its light -- at four or five times the cost of similar products that are just as effective.

I had the old-style Dynatrap plug-in. This new design is much better. It fixes the problems associated with the first version which had a lamp bulb that would break if you squinted at it. Plus, putting the sticky trap replacements was a nightmare. Dynatrap DT3007W has easy to insert traps and a much better lighting design. Someone working at the company finally decided enough was enough and brought a a new model.

Worked great for a month. Caught several months, mosquitoes and biting flies, even a few horse flies. It was hung in a lean-to of a barn. UNFORTUNATELY, It only worked for a month. Then the light went out. Purchased another light bulb, which took 3 weeks to arrive. Of course, by the time the bulb arrived, the warranty was expired and I can no longer return.
It is also difficult to remove / replace the bulb. There are 3 small screws that need to be removed within the casing - very little room and I have small hands. ALSO, when the basket is full there should be another means of removing the dead bugs - there are still live bugs in the basket (takes 24 hours for them to starve/die); when twisting the bub basket off it is difficult to hold on to and all the live bugs fly away. Ideally, some hole or something to drop or vacuum bugs out would be better. OR a handle to help hold the large basket while twisting.
////// UPDATE ///// August 2021 ////////////
Contacted the company via e-mail. They immediately sent me a call tag and a new unit within 2 weeks - NO charge to me! So far the new unit is working great. It has caught several mosquitoes (& some moths) in the past week. Very happy to have this unit back as the bugs have taken over without it the past month.

The product is working. I live on the bay and have terrible mosquito issues especially after a lot of rain. I needed to do something. I set this up and immediately began getting victims in the cage. After reading some other reviews, I think it is important to clarify how this thing works. It reduces and eventually eliminates the population in your 1/2 acre. It takes a little time to do this. So if you set the machine up, turn it on and then wonder if it works because you just got bit by a mosquito, you are misunderstanding how it works. You will still get bit as long as there are mosquitos in the area. But keep the thing running and you will get bit less and less until eventually there are no more around to bite you. That's how it works - it eradicates the population. Plug it in and leave it running 24x7. Don't move it. Don't turn it off when you're not there. Just leave it running in the same spot.

The proof is in the cage.