Buy the car, keep it until the warranty expires, put it in the nearest skip. Repeat. Cheap, hassle free motoring if that's what you're after. It makes no sense to buy one to change it after a few years though.
It's also worth noting the c'eed won diesel hatchback of the year from What car, so it can't be that bad.
With regards to cars with less than 100k rarely needing work, warranty means you don't have to put up with the niggles that might otherwise be too expensive to fix but be minor and annoying, and you have the benefit of protection against anything major going wrong.