I don't know anything about Woori's legit-ness, but on this site
http://www.dvdheaven.com/dvd/dvd_detail.php?idx=17253
it says it's R3, but the YesAsia site says R0. Still since the FX boot is non-existant and the R2/Japan version is $70+, even if it was a (high-quality) boot it may well be worth it nonetheless...