Works great for me
I do have a flat non textured tub bottom and my house was built in 2000. I've not had any problem with the suction cups. In fact they secure so well that I have to break the seal with my fingernails so as not to rip the mat. I didn't have high expectations for this, was just looking for something to create more bubbles in my tub and it totally works for that. While sitting on the mat in low only the top third has air flowing to it, about half on med, and the whole thing on high. It does feel good as well. I am only putting this review out here because there are so many negative reviews. It won't turn your tub into a spa bath but it will amp it up from being just a normal bath and make more bubbles for a bubble bath!
Rating: 5 stars