My first two computers were from Dell -- a laptop and then a desktop. The desktop came with the lovely Deathstar hard drive which, er, exploded after a few months. Dell replaced it ... with another Deathstar which also died a few months later.
Dell, again, sent a new hard drive. Fortunately, it was a 100GB beast from Western Digital. My computer was under warranty. So, Dell provided the new drives without charge.
After that, I decided to custom build my own computers. I've heard and read that the quality of Dell offerings has declined. Their reputation in the late 90s was stellar but now it's so-so.