Good adhesive, bad design.
352295
Overall, not a bad product. They really stick to the keyboard, and sure beat cutting letters out by hand. They fit well on a netbook keyboard. However, there are two issues:

1. The letters come stamped out of a plastic sheet, attached to a backing paper. However, when the letter outlines were stamped out, so was the paper. This means that about 1/3 of the letters come off with a thin layer of paper stuck to the adhesive side. It is difficult to peel off. I resolved this by using a razor blade to gently pick at the edge of the letter, so that just the plastic part comes off.

2. For keys F and J, there is no allowance for a little bump on the keyboard. So, have to use a razor to slice off approximately 1/2 of the clear part of the sticker, so that it fits.

In the end, they worked for me just because I don't have time to order a new set. It took me 45 minutes to attach all the letters. I think there are better alternatives.
4006471
I like it, but it doesn't stay stuck to my mirror or wall as I'd like. A better adhesive needs to be made for this.
490109
Adhesive is near permanent. It took forever to remove tape from floor after removing.
4491589
It works as advertised but it's so sticky that it's hard to install without ruining the tape. Especially in tight areas.
2475023
It works, but the problem is that the adhesive is too close to the "outside" end of the product, so some bare adhesive shows when it's properly attached to my toilet seat. If they moved the adhesive more toward the "inside" end of the product, it would be better. It's hard to explain, but you can't just move it in more to get all the adhesive under the seat, because the downward perpendicular tab (that blocks splash) doesn't allow for that.
2453305
The holder itself is wonderful; however, the adhesive square on the back is not great. I had this up for less than 2 days and it fell down.
2722908
Exactly as advertised, however, the two mounting screws provided are totally inappropriate and the worst choice for this application. The edges of the flat head screws stick up just waiting to snag. Almost any other screw head would be better. The underside of the screw head should be flat, such as a truss head, binding head or pan head. Almost five stars.
4952728
Pretty good adhesive, but the cases just fall apart, which is annoying, not to mention wasteful. I've taken to wrapping the case with Scotch tape before I start using a new roll.
3712107
Looks great.  Just lile 4x4 I purchased the adhesive is horrible!  The individual letters are pulling away from my truck meaning I'm going to have to remove and buy new ones to install. That makes me frustrated.  I cleaned the crap out of the area before hand as well. You need to rethink the adhesive you use.
Thanks
3957329
A good product, but getting the backing off the sticky surface is quite maddening.
1595314
Not self adhesive at all, good idea BUT WRONG DESIGN and WRONG MATERIALS R USED
2740393
I am sorry to post a negative review...  The clip itself is fantastic, however, I messed around for quite some time and cannot get it to stick to my dash reliably.  It stuck for 15 min or so after several attempts but ultimately it does not adhere well enough and will come unstuck and stick less with each subsequent attempt.  I did clean the dash thoroughly beforehand.  It's pretty disappointing as the rest of it is probably the most sturdy and no-nonsense design I've seen for a phone mount.  If I do not get a reply here I may see what 3rd party adhesives I can safely use on my dash to attach it.  Anyway, lot's of people love it so give it a shot.
312149
The screen protectors were sized great however the adhesives they put on the tabs to help separate them from the backing would not come off without manhandling the protectors and making them unusable.  I could not get the adhesive off the protector without using some kind of solvent and when I tried using the inside one, it stuck to the keyboard when I opened it.  Maybe it was just a fluke set, but I could not use them.
1029346
Design can be difficult in tight spaces, adhesive isn't very strong.
For temporary use, or use on sensitive surfaces like walls, I imagine this would work well. I used them in an automotive application which proved to be so-so for this product.
4953522
It works good!! just the adhesive is not enough!!!
3142965
I like the color, price, and simple design.  It's functional, but the biggest flaw is the adhesive.  The holder fell off within a matter of a few minutes.  I then crazy glued it onto the dash and the next day, the clear adhesive backing remained on dash but the foam part of the adhesive backing fell off along with the plastic holder and my CB mic.  At that point, I removed the foam part from the plastic holder and directly krazy glued the plastic to the dash.  It has not fallen off since (been a few days only).
2672619
I have been a long standing customer of 3M, especially for adhesive products, but let me tell you the mounting adhesives are worthless.  I have a glossy smooth finish I mounted the privacy filter to, and when closing the laptop the adhesive mounts would come unglued.  Granted I use the product on a laptop, which may get a little warm, and closing the lid probably loosened them (but regular tape adhesive mentioned below works excellent?)

I got fed up with having to restick the mounts everytime and then try to slide the privacy screen under the mount's edges on both sides  simultaneously to secure it.  This is when my BIG disappointment came.  The privacy filter is apparently a stiff plastic with a second plastic coating (makes sense), except the seam split on the corner edge and peeled apart and now you can not legibly use the product (one corner is cloudy now).

I finally got angry and used regular clear tape to adhere the filter to the screen!  It works a lot better.  Just wish I would have been smart about it, before the engineering mistake cost me $45.