I have had 3 over the course of my life. They are great dogs. We always had them to keep critters out of the yard. They are excellent watch dogs but only for animals, not people. They would help a robber carry your stuff out haha. They do bark alot. But it does keep the animals out if you don't mind the barking.
They do require alot of up keep(hair wise). Ours only stayed outside and never came indoors. In recent year my mother got soft and let them spend the night in the basement, which ultimatley defeats the purpose of keeping the critters out. Lots of bathes and brushing. Very thick hair and they shed alot. We should shave ours in the summer. We also found they really didnt like coming inside because they would get too hot.
We have always only had females, we never cared for the males. They have a different coat(more stringy and not as attractive) and personality wise the females seem to be more personable.
Overall they are an extremely sweet dog, good with other animals(as long as they are yours! and not wild) and kids. They will hunt and kill things that do not belong in your yard as a warning. We had one that would fish when it flooded and would actually catch fish (wading of course, they CAN NOT swim) Would tree raccoons until my dad would come and shoot them, she literally would stay there and wait for the raccoon to fall out of the tree and wouldnt budge until she had him. Muskrats, beavers, squirrels, and SKUNKS!! You name is she killed it. We also had one that LOVED vegtables, we had our fields farmed, and she would come back with corn, green peppers, cucumbers. Eat them on the lawn, she actually would peel the husk away from the corn and only eat the kernals and not the core, it always looked like a person had been eating corn on the lawn, same with the green peppers, everything but the seeds and the stem. She was a great dog.