Overall the product and customer service is excellent. I have had two battery malfunctions. Both were resolved quickly, without hassle, and no charge. But, it was a bit troubling to be without the collar for several days while the issue was resolved. The configuration of the static response is, I believe, probably the most humane configuration and is generally very effective. However, my English Shepherd, Teddi, has a high prey drive. If he spots a deer, squirrel, ground hog or any other critter he takes off like a rocket and zips through the boundary before the static response can happen. His chase is generally very short, even for deer, and he returns home quickly. I purchased the cellular service and have been extremely pleased with this. It provides great piece of mind whenever Teddi is out of sight. In short, if the battery issue is resolved and the static response could be adjusted to trigger when the boundary is breached by a streaking dog, Spot On would be perfect. The customer service is great and they stand behind their product. Overall, I think SpotOn is best system on the market.