I originally bought Zagg's Invisible Shield full body protector, at about three times the price of this HTC branded pack. For all its talk of being unscratchable, I was a bit miffed that the Invisible Shield became scratched while I was applying it. This despite taking my time applying it and using the provided warranty card to "squeegee" out the air bubbles, which is when it got scratched.
Anyway, this cheap and cheerful 2-pack of protectors arrived today, and the experience so far has been far better.
The protectors are mounted either side of a cardboard insert, with the instructions on the reverse. As you'd expect, the protector is cut precisely to cover the Desire's screen which - as long as you take a little care to line it up correctly - makes application a breeze. Just peel off the plastic backing and lay the protector over your screen, no mucking about with sprays or damp sponges.
There were a couple of air bubbles, as I knew there would be, after sticking the protector down, which brings me to my only major issue with the product: there's no squeegee included. The bubbles were extremely simple to smooth out though, which I did with a combination of my finger and a Clubcard keyfob.
Once on, the protector is barely visible and certainly doesn't diminish the look of the handset. Better still, there's no "orange peel" effect to the protector, nor in my case is there any sign of micro air bubbles trapped there, not that I can see anyway.
So far, there has been no loss of precision or sensitivity to the touchscreen whatsoever. The screen itself doesn't feel any different to the touch either.
I'd definitely recommend these protectors, it's hard to see how you'd do any better for a fiver. The only way to improve the package would be to include a squeegee and maybe a cleaning cloth (hence I'm giving four rather than five stars) but after a couple hours' use I can't complain about the protector itself.
EDIT: I've noticed another reviewer saying "Despite being billed and packaged as a screen protector by HTC for the Desire, these protectors have obviously been produced for another similar HTC phone. They have a cut out rectangle and hole at the top which does not relate to the Desire screen."
The rectangle referred to is at the top left of the protector, and leaves two sensors - you can see them if you look at your phone carefully - uncovered. I presume these are light sensors that are used for the screen's auto-brightness detection setting.
The hole is at the top right, and leaves the alert LED, which lights up when you receive a notification or have the phone on charge.
I'm not sure why the LED needs to be uncovered, but I guess that HTC and their manufacturers found the protector to interfere with the light sensors in some way.