9/10 of my nails fell off over the course of 1 week. I wasn’t doing manual labour or biting them, they literally peeled off. I managed to have 2 of my nails redone before my holiday by a different lady and those are still on strong. I lost 2 whilst packing for my holiday (not the most strenuous task). I have had extensions done before and they last for at least 4 weeks.