I can only agree about the Westin Hotel in Busan.

if you are Bonvoy member, dont bother booking this hotel UNLESS you want to be close to the beach.

Dont expect upgrades, late checkouts, breaktfast or additional services. I have reserved the place months prior arrival holding Amb. status. Even asked the Ambassador for support but they would let me wait two days before arrival to inform me that nothing is available - knowing that I wouldnt find anything else on such a short term.

Anyway, it is close to the beach but dated and over crowded.