I buy PIC brand often. This set (box) burns a bit faster and is a tad more brittle than the box before it. Not really a big issue, just handle more carefully. The faster burn does produce more fog in the air, which is good when trying to keep the nasty mosquitos away.

Well I tried one when I was sitting outside, this seemed to work. My only complaint is that I don't know how to"shut" it down when I'm going into the house. If I'm only outside for say less then an hour I don't want to let it continue working for the next two hours. There must be a way to stop it and re-light it later. It just seen like a waste of 2 hours of I'm only using an hour. Which by the way they said it works for 3 hours and that's exactly how long it works. I recommend.

We have a farm that was recently inundated with mosquitoes during our last hay cutting. I had purchased these to take camping, but broke some out to keep the bloodsuckers at bay on our porch. We couldn't go out to get the mail or head out for chores without them coming at us in droves. We were looking like we had some kind of pox on exposed skin. We have good bug spray, but we have to wait until we get outside to spray it. These coils helped keep the onslaught to a dull roar to the point we could almost sit on our porch for morning coffee. We didn't want to risk it, though. Oddly, I didn't have to use them during my camping trip. The only annoying insects were yellow jackets and all they wanted was to share a bit of our food and water. I am sure if I hadn't brought these coils, we would have had to deal with mosquitoes. I didn't mind the smell of these and they lasted longer than we needed. They are a good addition to our arsenal against mosquitoes.

There's really not much to say about screens, they fit in the pipe and that's what matters!

We've tried everything. bug sprays didn't work (all natural and extra strength). Tiki torches didn't work. Citronella candles didn't work. The little thermo things that put off a small spray/smoke didn't work. These worked. This is the only thing that kept the terrible SC mosquitos off us. It smells terrible tho, and the smoke can get kinda thick when it's first lit, so we have them in a little container and put it behind our chairs on the ground so it doesn't blow in our faces. 10/10 buy them.