I'd take the Leon interior all day, every day over a nice, but badly put together interior or a horrible and badly put together interior.
115K later and all my interior is still there, no squeaks, rattles or loose bits. Sure, the plastic is nasty but you can't fault Seat for making it stay.
In comparison, our Skoda is on 90K and it's already lost about half a dozen bits of trim from the air vents, door, etc. - I was quite shocked about that as it's not a world away from the Seat but feels like it inside.