They are good . Actually Samsung and Lg both are korean companys so in addition to international version of any modle phone they both launch it's korean version too which is same but cheap .
Minor draw backs you'll have are
1. Korean network carrier logo on hardware (you can use back cover for it )
2. Pre installed korean apps and old android software mostly ginger bread(these phones can always be rooted and flashed with custom roms of international version)
3. Limited sms issue( after flashing custom roms this will be solved even if it does not it can be done manually after getting root permissions)
4. Korean network logo and annoying sound at booting and shutdown(it can be changed after rooting the phone)
They are good value for money and remember Android is all about customisation and there's a solution of every problem in Android world .
You can search for LG OPTIMUS/LG FAN CLUB thread in non wheel discussion section for further details.
Sent using Mobilink Indigo