Heres a list of issues:
Keyboard: had to have it replaced twice due to keys poping off; they refuse to let you purchase the scissor hinge for $0.25, instead you have to have it completley replaced for $300. Best part is, my current keyboard needs replaced again!
Mouse: I sent my laptop in for the keyboard to be replaced, had no issue with the mouse prior; as soon as i got it back BOTH the trackpad and "eraser" mouse stopped working (it's not an issue with the OS as it's been re-formatted a good 8 times since then). I'm now using an external trackball.
Service: I sent my laptop in for repairs, waited about a month for servicing; heard nothing. Called in and got some guy who couldn't even speak english (no it wasn't the spanish line, they told their outsourcer (solectron) that they wanted to have support in PAkistan so that they could have the "cheapest possible support)... The guy couldn't find my system; in fact he demanded it had already been returned to me! Turns out after half an hour of me screaming at him he was giving me the delivery date of the box to ship my laptop to them (note, I told him that 3 times, i just had to pound it into his head for half an hour)... He then "magically" realised this and after another 45 minutes located the system (it failed a buttload of internal tests at that).
I have more issues with them too

... All in all, never buy a dell.