I have a unit from loong that I purchased over a year ago that I wore practically everyday for at least fine-six months. To this day, it is still my favorite unit and I refuse to let her go. No issues with it thus far. The only adjustment I made to the unit is adding tracks in the back to give it more length and that baby is still alive and kicking. I use her for backup purposes only.Like said before, it depends on how often you wear the unit and how well you care for it. another example is that i purchased a frontal from loong and truth be told, i have worn the frontal at least twenty five days out of the month for the last six to seven months and my baby is still holding up strong. i had to buy another frontal cause i want to cut a meaghan good swoosh in the front of the old frontal and if that doesn't work out, at least i have a backup frontal and my old standby full lace human hair wigs.