My wife had an i20 diesel, 4 years old. It smoked like a bastard when you floored it, tail light loom was dodgy and kept loosing it's earth, heater matrix blocked so was replaced under warranty, that lasted 2 weeks until it leaked so had to be replaced again, it squeaked, it rattled but it did have 120k on the clock.
To be fair though it had 4 electric windows, power fold mirrors and the most freezing cold air con I have ever experienced.
But in a nutshell, no don't get a Hyundai. They are shit.