Toshiba HD-A1 HD-DVD Player
Extremely slow response to user input
I noticed that the response time once a remote or player button is pressed is extremely lagging.  So much so that one will find themself pressing the button over and over thinking something was not right with either the remote or the player.  Other than that I am impressed with the HD quality of the picture as well as the price being 1/2 that of a Blue-Ray player.