Interesting, it seems like many people have bad experience with HP Support.
For me though, it was mostly positive. I email them, describe them my problems, and a day or two later they send me back an email with a box arriving at my doorsteps shortly after. The whole process takes about 3 weeks, but everything's free, so I can't really complain.
I've sent my old dv2432ca into support about four times, with the fifth trip being its last - it got replaced by the dv4-1117ca after I dealt with the case managers.
The dv4-1117ca is gonna be going back to Ontario for another round of repairs now though 🙁. This time, it's the USB ports - all three of them died on me yesterday night. No clue why. Went through 5 reinstalls, Windows 7 and Windows Vista and still no luck :\
But I would still consider buying HP in the future. At least for me, the services were quite nice.