The "claw" holds the phone, even though the Desire HD is quite heavy, without problem. Can adjust angle/orientation easily and tighten to keep that orientation with the nut behind the claw. Comes with an alcohol pad to clean the area you are going to attach it to on your windscreen.
Fitted this in a VW Golf VI, was worried at first that the charger cable might be a coiled (like old telephone cords)type that I'd seen in some images, as I'd been advised that it was possible to hide the cable that comes from the cigarette lighter socket adapter in the space around the steering column. Cable was straight thankfully, slightly longer than the cable that comes with the phone. Also had a movable sucker on it to help keep it out of the way. All in all it's a good product, only thing I'd complain about is it's a little pricey if you consider a lighter socket to USB adapter can be bought for ~£3, USB to micro USB cable for £3-4, and a generic mount for around about a £10 (paid £30 for this one vs £16 for combination of non HTC generic parts).