This review may be a bit premature because I only finished the fence and started training yesterday, however, I must say that I am extremely pleased with both the product and the results that it has had for our two yellow Labrador retrievers. They have quickly learned what their boundaries are and won't even go near the line of flags outlining their outer limits.
The system is comprehensive in that just about everything is adjustible from the range of the boundary to the level of correction and even the type of correction. I have the collars set on 2, the lowest correction and it's more than enough for our Labs to get the idea that once the collar starts to buzz and beep that a static correction is not far behind.
When they say that the system comes with everything you need, they mean it. It comes with 1000 feet of wire - if I ever need to replace my fence I have more than enough line to do the whole perimiter again, about 15,000 sq ft. You don't have to buy the special twisted wire either - just twist it up yourself to create an area of cancelled signal.
My hope is not to create a situation where my dogs get shocked - I intend to follow the training guide to the letter so that they KNOW their limits and stay well within them, thus allowing them more time to be where they should be anyway without my worrying that they will take off only to get into heaven knows what.
My only regret with this system is that I didn't buy it sooner.
Patrick Gleason