I followed the installation instructions...removed my old mercury thermostat and simply attached the wires as illustrated. For this kind of single stage system the install was surprisingly simple. The mounting holes even matched my old thermostat and I only had to put in anchors to reinforce.
Note - I had considered having a professional do this at $200 each, but a friend said that it was something I could do myself so I decided to save the $200 and give it a try. He was right. I had it installed within 30 mins.
Safety note - I discovered that my circuit break panel box is mislabeled..and the cutoff for my furnace was not correctly labeled. Take an extra few minutes and validate that your breaker box is correctly labeled and ensure your heating/ac unit is really off before you start.