Planned unit developments (PUD) have been celebrated as one of the few means of escape from the stranglehold of Euclidean zoning but little is known empirically about their use and implementation. In this paper, I present quantitative data from Michigan exploring the factors affecting successful PUD implementation. Results indicate that citizen participation, emphasis of PUD regulations, PUD appeal and differences among key players during PUD review have significant impacts on successful PUD implementation. I also find that Michigan municipalities are more successful at achieving mixed-use, density, preservation, affordable housing, community facilities and design through PUDs than through other regulatory vehicles.