Another happy ET-73 user here as well. As was said before, the switches are kind of small and delicate but if you're careful they will be fine. The only thing I didn't like about it is the probes that came with it have pretty short cables. But I ordered two 6-foot food probes and use one for smoker temp and the other for meat temp and they work great.
The other night, right before I was going to put a brisket on, I dropped the reciever from about 4 feet high onto a ceramic tile floor. The back cover flew off and the batteries flew out. I thought &^^%$^!!
Going to be a long night babysitting the smoker without the ET-73.
I put the batteries back in and the cover on and turned on the switch. It beeped, synched up with the sending unit and was fine.