I've been using Stacy Lash for the three years I've been lashing. I've tried three glues, the sensitive glue, advanced glue, and the crystal clear glue. they've all been so great and offer great retention (2-3 weeks for me). the bonder as an add on is also so great and their prices are great. the advanced glue has been so far my favorite, its had my weekly refill girls go to biweekly since it offers great retention.