I have been using this application since its inception, in addition to other virtual network computing programs (and their predecessors). ARD had been a great Mac solution, well-integrated with other aspects of the OS. My impression is that development of it has stagnated for the last 2 or more years. It no longer correctly works to remotely control a desktop with two monitors arranged side-be-side. Other VNC solutions correctly handle the basic connection at far less $.
jsmith ! about Apple Remote Desktop, v3.8