I use a Dogtra Edge with good results. Good battery life and easy to use.
The majority of my friends use Tri-Tronics and they like them. I have not talked to anyone that has purchased a new one since Garmin purchased them however, I have read reviews about a decrease in quality.
Echoing what Sprunt said, I don't believe you can go wrong with mid to upper Tri-tronics or Dogtra.
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