I felt the shelf was sturdy and just the right size to hang a hand towel. If you are looking to hang a full size towel, this is not the product for you.
The instructions didn't state which side of the glass shelf should face up. One side of the glass shelf is smooth and the other side is textured. I chose to have the smooth side on the top because I thought it would be easier to clean. Please note that this is not clear glass, but is frosted. The width of the self could be a smidge wider, but not too small to be useless.
My husband hung the shelf and he liked that a templet was provided which made lining the shelf up easier. If properly installed, the shelf is tight fitting, no worries of it falling out. The shelf does not move if installed correctly.
Remember that this is a glass shelf and I wouldn't put very heavy items on it to be safe.
I love how the shelf looks and feel it was a good buy.