I just received the 2 collars and receiver yesterday, charged the collars (the remote was already fully charged), and put them on my dogs this morning. They've proven to be very effective at getting my 2 little dogs in line. They typically bark like crazy at everything and nothing. Today, 5 barks between the 2 of them. Huge win. I even used it when they escaped out the back gate, and they came running back. They NEVER have done that before. I'm always having to chase them down in the woods or through my neighbor's yard and down her street.
I love that they came with a tester to check if the probes are functioning. There's a tiny lightbulb that lights up when you put the probes in it and press the shock feature. There were also rubber covers in 2 lengths to accommodate different coats. The straps are very long and would fit a dog bigger than any I've seen, but they were easy to trim-to-size for my little 4 %26 6 lbs pups. I just have the end a moment under a lighter flame, and they look professionally done.
It tells you to try the shock levels on yourself first. They did a great job starting with the faintest sensation at 1 and gradually increasing strength, but I didn't try above 10. It was pretty strong by then, and I had also done it in the same spot each time, which left red, slight (not severe by any stretch) burn marks on my arm. It didn't continue to be painful and faded within a couple of hours.
I tried it with the rubber probes, which actually seemed to make the shock feel a little stronger, but also didn't burn my skin. It would take an excessive amount of shocking at a high setting to cause an actual wound, though.
It was easy enough to learn how to toggle back and forth between channels for each dog. I like the screen lock function, and the sleek look of the remote and collar face. However, the one downside is I kept the remote in my back pocket and pulled out, as needed, and the face of the remote is already scratched up just a few hours later. That's kind of a bummer and does concern me about it's overall lifespan. Time will only tell.
There is another thing that could be improved, but is very minor and causes no issue with functionality. The wrist strap for the remote could use something to adjust the size.
The last minor issue is that there is nothing to attach a leash to. I used a keyring for one and a metal ring clip for the other to get by, but really feel like this should be a feature it comes with.
Overall, I am quite satisfied with the purchase, though, and if the screen on the remote doesn't get much worse very quickly, I would recommend them over others I've tried.