I have really struggled with the optical thumb sensor on our remote from day one. The majority of the time it is practically unresponsive. To move the cursor an inch on the screen takes 10-12 swipes. I have adjusted all of the settings for sensitivity to no avail. I had others try it to take out the human error possibility ( like calluses, technique or what have you) I have even returned the remote ( not set top box, just remote) and exchanged it for a replacement and we are still having the same experience. Everything else on the remote is extremely responsive, but the mouse is practically worthless. I have called support who confirmed I have the latest firmware, made me resynce the remote, and even fully reset the box ( Pain in the rear) but none of this helped. After 4 hours on the phone the Tech determined the entire system needs replaced. I was told I was being sent a return label two weeks ago, but it has not arrived. ( thats a story for another time) . My question, to this forum is Am I the only one that finds the mouse practically none responsive? Do we lend any credence to replacing the setup box solving the problem?