You need to understand wherefore objective your shelf is mosting likely to be utilized for. If it is to hold lightweight things, then a simple floating wall surface rack would certainly be adequate. However, if you are going to put hefty equipment, publications and things on it, it just makes good sense that you get a solid metal or wooden rack with correct brackets for support. You do not intend to obtain a shelf that is incapable to hold the weight of your things, and also ultimately collapsing down. Always inspect just how much can a particular rack or bracket hold prior to making your decision.