I've enquired about something like this whilst I was in Singapore, the salesman told me it'll last 1 to 1.5yrs depending on the environment.
Price about the same, 4 x of this thing is enough to repaint the whole car. The level of shine from what I can see is that they are the same as
before. What I mean is that it's like what you've said, all about protection, best sent in when you first receive your new car and start from there.

If you must have the best shine, stay with wax. This stuff is tempting to me tho, cos I'm getting lazier to wax my car.
I just wonder if the 3 yrs warranty covers maintainence as well and to what extent the protection deteriorates before we can
ask for re-application.