I previously owned a much cheaper shock collar which functioned but after a year, no longer held a charge.This one has a much more solid build than those. The quality is evident. I was torn between a few different models from Sport Dog and decided this one had the most flexibility.First, I wanted the ability to use either the audible beep, vibration or shock. I also wasn’t sure what level of shock was needed for my 70 lb Golden who is mild mannered but occasionally very stubborn. This one provided all 3 levels to allow me to find the right level. Turns out, it only took low at level 3 to get his attention.I like that it’s orange, in case I misplace it— easier to see where I dropped it. Like the screen, it provides exactly the info I need (shock level, battery remaining)What I really like is that it’s water proof. My dog loves to swim, run in the snow, splash in mud puddles, etc and I don’t worry about having to take off the collar for those environments.As far as the shock, I only had to give him the juice twice. The first time, I had it set at medium and dog nearly jumped in the air when I hit the button. From there, I only needed to grab the remote and he knew I meant business and would follow the command provided.A few weeks passed and only a beep was needed to correct him. Then he decided to test the boundaries again as he ignored a command to stop as he was headed towards a place I didn’t want him to go. Hit him with the zap, at a much lower level then previously used. He stopped in his tracks and returned immediately. Have not had to provide any correction since.Overall, it’s expensive but it’s good quality with huge range, lots of options and the battery seems to last forever between charges. It is well worth the piece of mind it provides when hiking with my dog, off-leash.