I was one that did get a bad one, actually 2, but Maverick did keep replacing mine until I got a good one at no cost to me. I am very happy with its performance and it is much more economical than the Nu-Temps.
Not saying one is better than the other but you can use up to 3 additional units with NU-Temp to monitor more pieces of meat.
There are some other differece but they are very minor and can be worked around!
It's up to you and how much $$$ you want to spend. If money isn't an object than I would push you towards the Nu-Temp...if it is a concern, the ET-73 works great!