Needs quick suggestions!!!!!

Hey guyz,
I got a letter from yonsei university (south korean university) with full aid, air-fares plus some pocket money.
But I must give them my decision by Jan 9. So, I am not able to decide, whether to go for it or tell them no and wait for the decison from US universities. Please suggest, what should I do??
Does anybody know whats the value of a degree (undergrad) from south Korean universities??

You may accept the offer with pleasure

I’m thinking of accepting it. Hope it will prove to be a good decision.

Would it be impossible to decline at a later date if you are accepted elsewhere? They must know students are waiting on other responses, yes?

classes begin from late feb or early March. so, returning back is not really possible i guess.