Stellar dog is fillmore propitiate drive if budget is khodadad but the prongs seem marginally longer. The handheld unit is quite small, which I like. And the SportDog allows both tone and vibe, which I like, as I prefer not to stim shock the dog when possible. The range isn't as as the Tri-Tronics, and I'm not sure I'd the units, which have rubberized covers over the charging ports, would be as waterproof as the Tri-Tronics, but there have been no problems far, and the price, convenience, and size of the unit are real selling points. By: Family pet. I had a G2 Sport Garmin, and the battery went dead 14 months What's nice is it vibrates, and that's usually all I need to get the dogs attention. Time tell though, because I've only had it a few weeks, which is not enough. Ask me a year, although the video says they used it a year on their Lab with no issues. By: Family pet. I didn't get to use it much yet. What little I did we had to use a really high setting because she is SO stubborn. Even trainer was amazed at how much was needed. Once she realized what we wanted, she did much better, but I hate to use a high setting just to get her attention. I start using it more once her stitches are out, and she can get out there again. By: Hunts. Family pet. puppy is only 3 months, I have not really used it on him yet other than putting it on him to play he associates a good time with the collar. I start using it when we work on come command. Overall I am pleased, but wish the collar had another loop on it to contain the excess. Currently he is very small, and he can get to the excess collar and chews on it. I am afraid to cut too much off for fear that it be too small when he is adult. This is first hunting dog, and I must say that I am very grateful to have stumbled upon this site. Although I have only made 1 purchase, I have read countless articles and reviews on other products. The information was very helpful, and this is now go site for gun dog questions and products. By: Family pet. It has been cold and snowy here Chicago that I have only had a few opportunities to use the 425. Our dog and I have to learn more about it together. Two of our kids use the collar with their dogs and sold me on getting one. The few times I have used it, I have gained confidence working with the dog. I feel that rating improve to excellent, as we get more opportunities to use it. By: Family pet. Why do you have excellent already chosen if this is a survey for customers to fill out? I did like the quick mail service as I've had problems with UPS the past. The collar works. sized dog is not running away while we walk the woods anymore and can be trusted off leash. By: This product delivers everything that was promised. It is easy to use, excellent quality and covers all the basics well. far dog has responded well. I have not had to use the ranges beyond the sound and vibration. He is a well behaved and trained dog. I got the device to control his barking our house, which is minimal to begin with. dog had no issue accepting the collar, and the vibrations are just enough to support the no command. All support material was easy to comprehend and on target. The only reason I did not rate as excellent is it is early the training process, and the results for total change of behavior are still a work process. If you are need of a basic, easy to use command device, I would highly recommend the Field Trainer SD-425. By: Family pet. This product has worked wonders opinion. dog is always pulling at the end of his leash when we walks and can be misbehaved when we go to other people's homes. After working with him with this collar after 2 weeks I saw dramatic improvement. When the collar is on he knows it's time to listen and behave. The only down side is dog has very thick skin the collar doesn't always pick up when I give him some pressure, however this is easily fixed