Product was great and fit perfectlyThey fit really nice and tight without any adhesive.I could not keep AVS brand deflectors on my 2018 GMC Sierra, no matter how many times I re-taped them. So I ordered the $$ Weathertech ones, and they are a totally different design. They do NOT use tape, which is hard to get to stick to a rubber window seal.Instead, the front one is really an ingenious idea, using the shape of the window opening to hold it in. The back uses clips, which once you figure it out are easy to install. If they are installed correctly I don't see how they could fall out like some others have reported, but I am just familiar with the GMC Sierra so I can't comment on the other vehicles.Besides the fact that they seem very firmly installed, the best thing is that my "auto window up" works now with out feeling pressure at the top and reversing. Other brands that use tape cause the deflector to intrude into the glass space at the top and auto-up becomes "auto-up, auto down" unless you hold the button. These have a very thin piece that fits into the window channel and it does not interfere with the window travel at all.These look really nice and they are more aerodynamic that other brands, so there is very little added wind noise.Not sure how I feel about them just yet, I might update my rating later. The fronts look great I think. The installation process was a little scary because it requires some bending to fit it in the channel. The snug fit is all that holds it in place, no clips or adhesive. Downside, is you can hear where the window is rubbing on the visor when rolling up or down. I think that's just the nature of the beast with in-channel visors though. The rear ones have been less successful so far. They came with two clips for either side that press into the window channel and provide a support for the visor... assuming you can get the visor far enough into the channel as well to get over the little lip. I wasn't able to do this with any reasonable amount of force, and actually broke a small piece of one off. Not a huge deal because you can't see it. However, the visors have started to work their way down since I couldn't get them over the lip. I called Weathertech today for suggestions and they gave me some I'm going to try this afternoon. The lady said they could send me a replacement if I break these, so we'll see what happens. All in all, much more of a hassle than I expected from Weathertech.The clips are difficult to install when attempting to properly seat them into place and have them stay while trying to get the windshield in place. Some car owners would have difficulty in completing the installation depending upon their dexterity. If you have someone wash your vehicle, you need to remind them not to disturb these wind deflectors, because I have a problem with my driver's door windshield that now does not want to stay in place, because when someone hand washed my vehicle it was disturbed and now it has difficulty staying where it should. Otherwise, I like the ability to have the windows slightly open when it rains. This is extremely important with high temperatures. This is the reason why I bought them. I would recommend them to anyone.All of the rain guards were easy to install. The only issue I had was the drivers side rear guard cracked in multiple place during the installation. It may have just been a faulty guard but now I'm stuck with one missing guard on my vehicle since they dont sell singles.Updated below the original post!Installed in about 15 minutes, went in without a hitch! Love the low profile look! The very first time I rolled the window up, it made kind of a scary noise. I did as instructed and didn't roll them back down or up for 24 hours or so. Next time I rolled them up there was no noise whatsoever! They work smoothly and as expected! I got the darker ones and love them. They look like they came with my truck! Installed on 2014 GMC Sierra and HIGHLY Recommend! They don't slip and they provide clips for the back ones to make sure they stay put with the install. You'll love them, I think they were worth the price and just bought some for my girlfriends Lexus! She loves them too!UPDATE: December 2019, I’ve had these for over 4 years now and they’re still perfect! This was a great purchase, I highly recommend them!First of all, I thought WeatherTech was made in the USA!! Wrong!! Designed in the USA but made in Germany!! That is not American made in my book!!Be that as it may, I have had a 1992 C/K 2500 Chevrolet extended cab and a 2011 2500 HD Extended Cab Chevrolet that I had WeatherTech Side Window Deflectors that fit really well. These 2018 deflectors for my Chevrolet 2500 HD Crew Cab do not fit as well or as nice as the previous ones!! Not super flush and tight like older ones.I hope I don't have any problems with these in the future as I just installed them today. I feel the quality in the looks department is not designing for a perfect trim and neat fit as older ones?? Maybe older ones were manufactured in the USA?? Just wanted to let people know.Still seem to be a decent product, just not as neat and pretty a fit as older models?? Made In Germany!! C-mon!!After about a month of use, the rear one on the driver's side just flew off while driving down the highway.They were installed 100% correctly....I saw the other complaints but thought since it was "weathertech" that somehow mine would be different.Fit perfectly and look great on the vehiclenice