I got a Lab puppy last December, so I leave the back door open most of the time while I'm home. In the spring, started have mosquito problems in the house. Getting bit, and hearing the damn things closing in, wasn't getting much sleep. So I sprayed bug killer, with little help. Hung up sticky fly paper strips (works), but saw the fan gadget (who could resist). Haven't had a problem since. Could be a number of things, maybe the puppy catches the bugs, but went through the summer without mosquitoes in the house. I put the noisy mosquito catcher on the back porch shortly after the house was free, still seems to be working well.
It's hard to tell what is actual science, and what is marketing these days. Most every device on the market, seems to have scientific proof their product works, and everything else won't...