It sticks, but doesn't apply evenly
933505
The adhesive doesn't apply in smooth lines, and, when you press too hard to try to even out the application, the device can leave imprints on the back of whatever paper you're trying to apply it onto. I've had better luck with Scotch extra strength adhesive for scrapbooking.
1765299
This adhered great, except for a tiny bit on the upper left hand corner. I tried smoothing it down but it never stuck..? It's more an eye sore that bugs me more than anything. Hope it will still work if dropped. Any tips on getting it to smooth down would be appreciated.
1977952
Shipment was fast...but it doesn't stick to the wall like it should. I have to keep applying pressure to make it stick.
823937
The protector itself is decent, but I went through all three of the shields in the pack trying to apply it evenly without a weak spot where it pulls up. It doesn't stay applied very well, but I'll try cleaning the surface more thoroughly first.
2301168
These labels come in a label pad with three colors.  You peel the label off of the pad and adhere to a surface.  The adhesive reminds me of post-it adhesive, perhaps a little stronger.  There's no residue when you remove the label from the surface.

However, what I found is that the stickiness was inconsistent.  For example, I tried using these on the cabinets in my home, made of laminate.  2/3 of them began having raised edges after a week and then later fell off.  1/3 stayed on.  I also tried using them on manila file folders, and this time, around half of them fell off.  I used them on plastic storage containers, and only 1/10 has stayed on after a month.  I adhered one to a metal door plate, though, and that one has stayed put with no problem.  So, it feels to me like the adhesion is hit and miss.  It's really like a post-it note that is also a label, with all the pros and cons you'd expect from something like that.
2859663
It doesn't stick to all of my phone, this is the second one I have tried and both times something thing happened.
1770287
It sticks well but I would prefer it to be more outlines instead of a lot of the clear with it.
1775646
It sure does stick.

Great if you want it to stick, but when its time to take off.... Impossible, takes forever and leaves a lot of residue.
4924352
You mess up a few times and your done. Once it's on it's great. But if you're not perfect this thinks attracts dust and things can start to look bad if you don't get it right. My first try started to attract a lot of dust and lose its adhesiveness. I finally gave up and threw it away. Thank God the second one I did a pretty good job.
1719416
It doesn't adhere as it is supposed to and that makes it almost impossible to use
3585045
I stick this on my windshield and unfortunately sometimes it will just fall off while I'm in the middle of driving. It always causes me to jump and have to rush to catch it so I don't get lost. There is a tip to use warm water to make it sticky again (because I noticed the circumference of the suction was not sticky anymore) and I tried it and it did not really help. For the most part though, it works and my phone is stable. It is simply the mount itself that isn't stable.
4159018
It's a great sticker, but doesn't mold well to curved glass. I put it on the back windshield of my car, and the edges of that window curve slightly, and this rigid sticker just sticks out straight. Trouble is it's on so solid on the flat part that I don't want to ruin it trying to pull it off to relocate it. Doesn't really bother me though. Still a good product!
2049084
I purchase this bondic glue with the intend to glue a plastic hook to the dashboard of my van. But sadly, it just can't stick to the dashboard. I am able to use it in some other situations effectively. I figure out to for making a effective bonding, the area is better to be "rough". So the glue has a way to anchor on the rough surface to create an effectively bonding.

Thought it is really not an universal glue, I like the idea that I control when to cure the glue, The price of this glue is at premium level, that's one big down-side.
4352851
really hard to put it right. this is not the first time I'm installing a screen protector, but this one won't stick perfectly no matter how much I've cleaned the surface. or, you'll have to buy like 3 of them to practice and maybe eventually you'll get one right.

Update: The seller was nice and sent me another one for free. This one was better. It is still harder to install it correctly comparing to the usual plastic protectors (maybe you should do it in a lab with air filters and stuff, cause no matter how careful I was to not get any dust or stuff flying around, I still got some spots under it), but the item itself is quite good in general. Will give it a 4 star.
4610184
Creates privacy but it doesn't seem to stick to my windows very well, so I had to use tape in some areas.
3999088
Say it's best seller but it wouldn't stick all the way around and I've tried both .
3134610
Sometime it works but most of the time I can't get it to stick. I've started using gel super glue.