installation is super easy, in the regulator guard just remove the cap screws and place guard over the regulator. The oil cooler, just remove the 2 screws from the lateral plastic cover and slide the oil cooler guard. In terms of quality, depends on which one you bought. I bought them on ebay, and was impress with the quality and materials.
I received the guards yesterday (Thursday) and installed them tonight. Not complicated at all. They even included a small tube of thread lock for the regulator bolts.
I am impressed with the products. They look to be laser cut and are not so thin that they flex. I don't know how long the double sided tape on the oil cooler guard will last, but I guess I will find out.