Hi Pumi -- there are so many products out there -- if you can get samples of products you can find out if they suit your skin, i.e, too greasy, etc. but you'll not be able to judge them over a long period. I find that with any cosmetic it takes 6-8 weeks to make an assessment. One thing with night creams -- I find they're too heavy for my skin so I've been putting a night cream on (I use the Cellex-C line) about 1/2 or more before I go to bed. If my skin feels oily after that time I lightly pat the excess off -- 'cause that excess will just end up on your pillowcase. try to narrow what you want by assessing if the product is for normal, dry or oil skin. Then look for added benefits -- do you want the cream to target lines, spots, etc. Cosmetics react differently on each person, sometimes it just takes time to find what helps your skin.