I bought one of these screen protectors in anticipation of my new Sony Xperia Z1 Compact contract phone's arrival.
After unboxing the phone, and removing the protective film from both the phone's screen and the screen protector itself, I had this screen protector on the phone and perfectly aligned in 30 seconds flat.
No bubbles to iron out, no struggling with the thing because unlike plastic screen protectors most people buy, and the one supplied in-box with the phone itself, it's not flimsy, so it's easy to hold it between your finger and thumb by the edges with one or two hands and apply it without touching either the phone screen or the tacky back side of the protector.
Unfortunately, even though I managed to do this in 30 seconds, dust STILL managed to get between the two. This is one of the biggest drawbacks with all screen protectors, and in my view you just have to suppress your OCD tendencies (if you, like me have them to begin with) and accept it.
The provided 'lint-free' cloth is ANYTHING BUT lint-free. Rubbing your phone screen in a futile attempt to remove dust and or particulates will be an exercise in futility as this causes static build up that actually ATTRACTS more dust than it removes.
The cloth itself, while made of the same type of material that come with a cloth used to clean a pair of glasses, sheds it's own microscopic fibres which frustrate any attempts to have a properly CLEAN screen.
The provided squeegee is also somewhat redundant, since this is a rigid screen protector that doesn't get bubbles by it's very nature.
Removal of the screen protector can be somewhat difficult, but I've found that the easiest way to get it off intact without damage, it to get a thumbnail underneath the cut-out for the ambient light sensor on the left-hand side of the phone, and gently work your way along until you can lift enough off to remove it completely.
Don't touch the tacky side with your fingers, and certainly not with the 'lint-free' cloth, as doing so will render the protector completely useless and/or covered in fibres. If you do have a small amount of small fibres stuck to the back you can use the provided squeegee to attempt to scrape them to the edge and off the protector, but be careful not to re-introduce more fibres while attempting to clean. Good light, and a white surface recommended.
Finally, while hailed as "Tempered Glass" don't run away with the notion these are indestructible. My original one cracked around the camera hole with very little effort during a removal attempt, so I bought another.
They certainly aren't cheap, and many may baulk at the price, but the ease of application, and the amount of protection they provide easily beats any plastic screen protector. You just have to take your time and be CAREFUL during application/removal.
I also recommend completely turning OFF the phone so as any static and or electro-magnetic fields generated by the phone will not instantly attract dust naturally in the air towards the screen of the phone as your trying to apply the screen protector.