Had XPS 15 for 6 years for work. Screen started dying all the time in year 2. Magically fixed itself after being taken apart multiple times. Network card died. Replaced. Still disconnects sometimes. Added 16 gigs of RAM. Was super picky about what RAM it took. Battery did swell a bit, but then stopped and didn't affect anything. I never replaced it. Overall, I am not too happy, but can't think of a better laptop.

Edit: Saw another comment on overheating - I only run mine on a coolpad, period. I think it fries the RAM otherwise.