Granted, this thread may have gone on a little too long, but I wanted to add my two cents here.
Today I received my replacement ET-73. I shipped my original back to them and they sent a replacement. As simple as that. Completely no hassle.
As a test, I placed the probes in my oven, set the heat to 225, and started walking. It works flawlessly from every location around my home. At one spot it passes through two stucco walls the kitchen, bathroom, laundry room, and office walls and still maintained a solid connection.
I am one happy camper.