hi Miffy -
I just started using Sulwhasoo and really love it. I use the deep cleansing oil, herbal soap, and overnight vitalizing treatment. I also have been using samples of the whitening line. here is a good blog on Sulwhasoo...
http://sulwhasoo-sulwhasoo.blogspot.com/
I used to use other high end skincare brands from Chanel, La Mer, Sisley, La Prairie, etc...but I have totally switched over to Sulwhasoo & The History of Whoo (Korean brand)
The woman who runs the blog is very helpful and nice...I've emailed her w/various questions and she replies back rather quickly.