As mentioned >here< engine has the same base as Lancer Evo; but I don't think anyone can really tell much about mid-long term reliability of engine/gearbox since the car was just launched and it's a first on the sporty side by Hyundai...
Most people here probably have faith in Albert Biermann's input, Hyundai's 5 year no km limit warranty and how high the stakes are for Hyundai not to fuck this up... Plus maybe their former experiences with Hyundai whatsoever...
My future wife drives an I20 and we are very happy with the brand and how it performs until now....20k miles in 1.5 years and no issues at all.
Thank you for posting the link up in regards to the engine it seems that it should be a good engine and strong gearbox for up to 350 hp I would say.

