I spent a huge chunk of the last year talking to, on hold, or being arbitrarily disconnected from to Dell tech support.
I sent the machine back to memphis on three separate ocassions. Once it came back without having been fixed and I had to send it back again the next day!
Finally they copped that they sold me a lemon and sent me a replacement. Only the replacement (5150 for a 4150) weighed in at 10 pounds including power converter. My original weighed in at 4.5 including power.
I will never ever ever buy another Dell. Not a machine for the traveller.