“Admittedly, I was skeptical when read that these used suction. It seems like most suction-based stuff never holds very well, and with these being designed to help folks such as the elderly and people with disabilities you’d want them to have a strong hold. I decided to take a chance since it’s something a family member could really use.Being suction- based, it was really easy to install in the shower. I placed both bars in the shower based on where my family member indicated they would be the most useful. The shower walls are fiberglass, for reference. To check their hold, I pulled on each bar and even leaned back with my body weight. I was pleasantly surprised when they didn’t budge. I gave it a few weeks to be sure before leaving a review, but neither of the bars has loosened. My family member was really skeptical when installed the bars, but he’s been so happy and surprised with their performance. The bars themselves are sturdy, easy to grip, and they look nice in the shower. They’ve been really helpful, and I’m going to purchase two more sets for other showers in the house!Give thenm a try id, and don’t regret it! Great “needle in a haystack” find for me!”