The reliablty of Hyundai and it's sister, Kia, is listed on 3 sites as VG...about on a par with Merc/Audi/Volvo (so 2nd brigade, after the Japanese), but the point is that they offer a huge no nonsense warrant (well, Kia do...7 years is the trouble free life of most new cars), so, since the dealers are also classed as VG, it doesn't matter too much.
As to the cars, they have IMO moved up a huge amount in the last 5 years and the new ones are fine family transport. Looks have improved too but still a matter of taste ofc.
I'd say if you were considering Peugot/Skoda/Ford etc, then the Koreans should be on the same list.