When designing shelves of this nature, the manufacturers understand that these shelves are hanging with no external support. Therefore, they are specifically designed to be reinforced. This is done by adding attaching screws into the wall and the internal brackets are made from durable materials. They are also extended enough to give excellent support. With this type of design, you are able to put heavy items on these shelves without worry.
If you look for pre-packaged shelves and just cant seem to find any that go well in your home, you may need to take another route. This would involve doing a bit more shopping on your part but what woman does not love shopping anyway, especially when you are doing it to beautify your home. You might find that you will have to buy the shelves separately from the brackets. You may decide that you would rather go this way even if you do find that the other ones are nice.