1) Not sure, gotta ask those new owner
2) Maintenance is slightly more expensive to Jap made to be frank, but is just around 10-20% more.
  10K - around Rm300+-
  20K - around Rm500+-
  30k - around Rm500+-
3) There is still room for SC to improve, but not that horrible, at least they fixed most of the owners' problems here.
4) If you can get 5 years warranty instead of 3 years, why not? Ofcoz you can send to your own workshop to get it fixed if you wish to.