this review title is: empty tube of serum and the content is: i bought this set so i could try the products before buying i was particularly interested in the serum all the samples had product in them except for the serum which was all air in the tube how am i supposed to know if i would like to purchase the serum i feel robbed.there are other information for this review, one is this reviewer did purchase it and the other is 24 people think this review is helpful.