I continuously buy new concealers as I tend to struggle with dark circles. I found that this product works especially well if you use the one tip which was shared on Beauty Bulletin. Apply concealer before AND after foundation routine and this gets the job done perfectly. It is a medium coverage concealer which you apply with an applicator and then just dab in with fingers or concealer brush.
I have only had mine for two weeks but I don't use an excessive amount per usage so it seems that it will last a long time.