Update: 21 September, 2018. Very windy (20 kts), chilly (42 degrees), early fall day. Fired her up yesterday and today. In the past I could NEVER maintain at fire at these 'warm' temperatures. And the puffing would be horrible at these winds. Now absolutely no issues. Why is increases the draft under these conditions, I don't know, but that seems to be the result. And the design certainly obviates wind issues. Note: I did create my own screening to keep birds and vermin out; far less expensive. Report after initial receipt: Well fabricated. Won't be firing up the stove anytime soon, but will report back as to it's effectiveness in solving our blowback or puffing issues. I am very optimistic.Update: 19 December, 2018. This thing really does the job. 40 kt winds and NO issues. Warm (34-degree) day with no wind and NO issues. Still perplexed as to why it works so well, but in my case the effectiveness is entirely positive.While it doesn't sole all wind problems, I'd say it is probably around 90% effective, so much better than the standard chimney cap that came with my kit.Did improve the down draft from my chimney but did not completely eliminate it.My husband loves this!!! He had looked every where for a chimney cap that was made for our size and style of chimney, this cap is exactly what he wanted. He thinks it's so pretty all the neighbors must have noticed. It draws well and looks nice, thank you!All the smoke in our house! This couldn't possibly be the fix, right? Well it was! Works great! Very pleased.Came as promised, Good quality. But, it didn't help at all with our smoke problems on windy days. Took it down and replaced it with one that turns with the direction of the wind. That one finally worked, after trying three different styles.Solved a draw problem that kept from having a fire on certain windy days! Old quality and easy to install! I highly recommendit works great!