Short answer: great.
As long as you identify the fact that you would like to work with a real estate broker early on, it is my experience that home builders in Colorado are happy to pay a commission to the buyer broker. I have had deals at various stages in Stapleton, Lowry, Steel Ranch, and others…and while most seem to require that I register with them (on what they often call a “REALTOR® Registration” form), the requirements/expectations of me after that are pretty limited…allowing me to consider a healthy buyer rebate in new construction deals around the Front Range!