Morning!

So i keep looking at them and for the price of about 15-17k it will buy me a car with 100k on the clock.

Just thinking next year to get something like this for a sunday car!

How likely are these to go wrong?

Also are they worth the milage they give back?
Auto trader results:
Running costs
Urban mpg 13.2 mpg
Extra Urban mpg 27.7 mpg
Average mpg 19.8 mpg

Cheers.