I just received this item in the mail and have already installed it within 15 minutes. That includes opening the box, reading the instructions and final adjustment. The instructions were very clear and even advised to expect tighter than normal resistance of the mirror and mirror arm mounting screws. That is to be expected with any system which allows for adjustments-on-the-fly. Seriously, the arms will not break if you tighten the screws by hand. I can't say what would happen if you used a power tool but I warn against that as I have seen such things occur in my career as a machine mechanic. That experience also allows me to say before any road testing that this product is going to work just fine. The delivery was prompt and the package arrived intact.