I used my new ET-73 this past monday. It has an alarm if your meat goes above your set temp, or if the smoker goes below your minimum temp or above your maximum temp. The remote console displays the temps while you're inside.
I initially could not get the remote console to display the cooker temp or the meat temp, although the plug in unit was displaying the temps. The remote console only flashed three dashes. With a few google searches, I discovered that the remote console does not work unless you turn on the remote console before turning on the plugged in unit. It then worked great for this first cook.