Quiet cool arrived with no package issues, no damage and no missing parts.I Installed it with a friend. I feel it is impossible to do alone. It took all of 3 hours with two people having never done it before.After a day of use, the resonance coming from the vent was extremely painful to listen to upstairs. Even on low, it was annoying.I spent the following day, adding flexible plastic molding under the vent tube to help keep its shape. The strap they give you is so thin, it creases the tube and bends it. You can see from the photo I circled in red. I thought that’s what was making all the noise. It wasn’t. So I gave up. I was really disappointed with the product.The next day, I read all of the reviews searching for someone to comment on it. Finally, one reviewer said the resonance was annoying and he mounted the fan so the entire tube had no accordion to it. He associated the sound with an organ pipe. I thought, that’s it!!!So I mounted the fan one more rafter further from the vent. As you can see from my first photo, there is no more accordion to the vent tube. I also took out the 90 degree angle to it. I do have two straps on it spaced apart with my flexible plastic molding over the strap to help keep the vent tube shape round.Sure enough, that did the trick. Super quiet on High and Low speed. I couldn’t believe it!I also bought Denim Insulation R19 with sound barrier from Lowe’s. I put that under the entire fan installation. Insulation is blue. Wow, it made a huge difference in the bedroom. I can no longer hear the fan running above our bedroom. Made the entire installation even more quiet.Ceiling vent install looks seamless and turned out fantastic. Vent template they give you worked great.I also bought the quiet cool wireless remote. I didn’t want to run wires through the wall. The cool thing about the remote is, it detaches from the wall mount and you can take it with you anywhere in the house, then return it to the wall mount. It works more than 100 feet from the fan. You can install it where ever you want. I highly recommend buying that with your quiet cool purchase.Wireless remote has a high and low setting. Also has 1,2,4,8,12 hour timer.I gave it 4 stars because of the nonsense I went through to figure out what was creating the resonance coming from the vent. The resonance coming from my vent sounded like the space shuttle starting to lift off the launch pad after ignition. The rumble was that loud, I’m not joking. 🙄After all of that, I’m super impressed with the quiet cool whole house fan. We live 65 North of San Francisco. Our house is two stories with a tile roof and minimal venting. We don’t have air conditioning. Nights are cool, so the quiet cool is turned on from 5-8 pm. Quickly gets the house to the outside temp within about 15-20 minutes.I hope this helps, if you find your quiet cool rumbles a little after you install it.****After 2 weeks of use. Realized the quiet cool was pressurizing my attic due to my 30 year old home poor attic ventilation. Air was flowing into leaks in my heating ducts and flowing back into the house through the ceiling vents. We were breathing recycled attic air. Now I have a heating company installing all new ducts, removing insulation and improving ventilation.In summary, the Quiet Cool works so well, prior to purchase, I suggest to take a serious look at your attic ventilation. Consider gable fans to assist with the air exhaust. Quiet Cool air will not find its way out of the gable vents. Path of least resistance is where the air will go. Ducting, Ceiling Vents, walls, outlets, light switches, ceiling lights. It was so bad, three of my upstairs smoke detectors went off.Quiet Cool is impressive. It will expose weaknesses in your house if you don’t vent it properly. A Huge FYI!