I have installed it on my own. Easy to do if you have a drill machine. Good Product quality wise since i have them in place for the last six months and they have stood the test of time. Pigeons do not venture anywhere near it. However one has to be careful since spikes are very sharp that it should not endanger humans. Install them accordingly beyond reach of children or away from possible human contact zones. Manufacturer should in fact give this safety caution with the product installation guide.