Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best device ever!

I've had this remote for 2 years now and it still works perfectly. We have an almost 3 year old Brittany and got this when she was 1 because we don't have a fenced yard but would like to be able to let her run around as we live near a semi-busy street. It was quick and easy to train her with this system. We put it on her EVERY time she goes out to the bathroom and she is good with it, its part of the routine. We've only had to actually use the "shock" feature 5 times or less, but the "warning" beep is perfect for the times she starts wandering off. We take it to parks where she can just run and run and we feel safe knowing that we have control of her if she would get off track. The quality is good and we only need to charge it once a month (we turn it on 3-4 times per day!). Our next house will have a fence but for now, this is a great solution. It doesn't hurt her or bother her too much, but its for her safety. We love this product and don't take her anywhere without it!