Well, I can't claim a 30-minute installation. But once I figured out the correct placement of the various items, it has worked flawlessly. The instructions are clear except in the one area where it is, perhaps, most critical, and that is the positioning of the brass weight --- it must be placed within the large bend of the chain hook that attaches to the flapper valve, to keep the weight close to that part of the valve. Whereas the flapper valve used to be controlled by the level of water in the tank, it is now controlled by the Brondell lift device and the brass weight. That arrangement is critical to closing the flapper valve when the reduced flush mode is selected.
Before I finally figured out the correct placements, I called Brondell's customer service on their 888 number and talked with a friendly, helpful representative. To make sure the product would work properly, he sent me two additional brass weights (of slightly different shape) at no additional charge. As it turned out, I didn't need them.
My rating of Brondell: Quality product and quality service.