This panel is reasonably easy to install for someone with at least some experience. Instructions assume that you actually know what you're doing. You shouldn't attempt it if you don't. If you are using it as a sub panel (I was) you will need to purchase a ground bus, 6-8 gauge wire and a grounding rod. Square D QO are great panels in general.
My homes main breaker box is a Square D QO. So,I wanted my subpanel to be the same. Even though this is a main panel, I will be using it as my new subpanel. This will allow me to use the same quality breakers found in my main panel. Make no mistake,these QD panels are by far superior to the homeline models that are not designed to use the QD breakers. And,this supplier hands down give me the best price. They have been in this business for years and sold me exactly what I needed to do the job right. I would highly recommend this seller to anyone. Be sure to call them before you buy anywere else. You will be glad you did.
Happy Guy.