It's good, but not great.I have a 14" HP Elitebook 840 G3. Decided to go with the known brand name over the Akamai privacy filter, also sold on Amazon for a couple dollars less. I went with the 15.6" black filter because I wanted the filter to extend past the actual display area onto the black bezel area. I did have to trim it about 17mm, but it is now a perfect fit. Fortunately, we have a nice paper cutter/guillotine, so it was very easy to do.What's in the package (see picture)It has the filter, 6 adhesive strips, slide mount tabs, and instructions. The instructions say to clean your display with the enclosed lint-free cloth, but there was no cloth included in my package (the packaging does not mention a cloth, to be fair). The package says the dimensions are 194mm x 345mm. I measured 192mm x 352mm. Slightly off, but not significantly so.Note that my filter has a curved notch offset of center on one of the long sides of the filter, whereas the product image shows a sharper notch in the very center of the long side. Not that it makes a difference in functionality, necessarily, but something to note.What I like:The filter does what it says - it filters the picture for those trying to look at the screen from an angle to the side. I positioned myself at about where I would expect a fellow passenger on a plane to be sitting next to me and I could see hardly anything. Only if I intentionally moved closer to get a better angle could I see, and that would be quite conspicuous.I used the adhesive strips so it would stick to my flat display. I did not use the slide mount tabs. It is a VERY clean look and almost looks as if there is no privacy filter even attached. Big positive. Those slide mount tabs are so unsightly and this looks really nice.Installation was very straightforward. As I mentioned, I used the adhesive strips, not the tabs. Mounting instructions are very clear. It went on easily and sits right on the display with no bubbles.The touchscreen actually works just fine. I don't need to use any additional pressure, so that's a positive. My advice? Get the largest one for your application and trim if necessary. That's a better situation than getting one that ostensibly "fits" but is then too small to use the adhesive strips, for example.My display is already glossy, so I kept that look. The matte was too dim for me.What I don't like:Main thing is that the filter, whichever side it is one, reduces visual clarity and brightness, even from straight ahead. None of the images or text are as sharp as they are without the filter. Even with brightness cranked up all the way, it is probably about 70-80% of full bright with the filter in place. I assume it's due to the "louvers" they have in place to create the filters. This is, in my opinion the primary drawback of this item. I'll have to see how annoying it is over time, but must be noted.A trade-off to having used the adhesive strips vs. the tabs is that this is less removable. What I mean is that the instructions say you can remove and replace, but it's clearly not intended to be removed every time you use your laptop. This means that it will be more annoying if I am watching a video or doing something requiring greater clarity or brightness to remove and replace with the adhesive tabs, so it will likely just stay on and I'll live with the reduced visual clarity.The other thing I'm concerned about is where the pointer stick is. I already know it leaves a little mark on my display when I close my lid, even without the filter. I have confirmed it does the same with filter in place. The one thing I don't know is if it will cause a permanent indentation in the filter, or just a mark that can be wiped away. We'll see.Note that I do not get the vertiical lines that some people say they get.Overall, I like it, but be aware that it won't be as sharp and bright as without.EDIT: I've tried pulling off the filter which was attached with the adhesive strips and it came off pretty easily. I was able to attach it and it seems pretty secure. I wouldn't want to do this too frequently as it might collect dust or lose adhesion if the display is unclean, but it seems to work once in a while.UPDATED 04.16.2018After living with this for a month and over several business trips (including one overseas), I am pleased with the product. I've had colleagues sitting next to me telling me they couldn't see what was on my screen unless they were pretty much over my shoulder. It hasn't taken on any damage (i.e., creases, dents, scratches) from the frequent opening/closing of the display so far - it is early yet! Any marks from the keyboard and pointer stick are easily wiped away.The reduced clarity and brightness still annoy me at times, but reducing the brightness is actually an unexpected benefit when working on a plane with dimmed cabin lights. But the other 95% of the time, I wish it were a little brighter.A month in, I'm glad I bought this and, on balance, I would still recommend it.