The Alvin tub door in matte black gave our bathroom the modern elegant look we were looking for as an addition to our guest bathroom.   The frame is solid and very well made.   The 1/8" tempered glass is thick enough for that five star hotel elegance appeal. It was nice to have options on the installation of the doors as they are designed for a reversible installations.  The hidden wheel rolling system slides effortlessly and without any resistance.    Installation was clear and very simple.   We installed it on tile which took slightly longer than the advertised 1.5 hour installation time.    Very nice addition and very much recommended.