I think anyone who posts on or reads the doghouse regularly would know of the problems I have had with Devil Dog. Had he been in a rescue and not a pound, and had he been assessed prior to rehoming he would never have been placed in a home with young children or cats or men.
As some posters here will know I have poured my heart and soul and much of my disposable income into making the situation safe for both the dog and the children and the cat. Not so much DH 
There have been times in the past when I felt that giving up would be easier for both the dog and myself (although rehoming or killing him was never an option, by giving up I mean realising and accepting that he will always be a dog that needs 'managing' and would never be fully trained or trusting of children and strange dogs)
Recently he has repeatedly shown me that he gets it. He finally gets it. He is no longer a Devil Dog, but a happy, well adjusted, well socialised, balanced dog.
I cannot even begin to describe the sense of pride I get when he curls up on my lap (something that was previously unthinkable) or approaches one of the children for attention, as opposed to just tolerating their presence. Or when he walks past a dog or a horse without reacting.
He sat with his head in dd2's lap last night and would not leave her side all night because she had been away for a few days. This is the very same dog who would growl at and then hide from children when he first came to us, only ever showing a glimmer of trust in myself and spending much of his time hidden under desks or in crates, quite happy to avoid interaction with people.
We still need to work on his powers of invisibility and the dining table, but, hey, no one is perfect 
He is no longer my problem dog, but actually the better behaved of the two 
Watching him trust in people and behave how he knows he is expected to, certainly makes all the work with him worth it and kind of makes me want to go and find another devil dog, to do it all again.
People like me and Midori and Scuttle who are willing to put this time and effort into a dog are by no means a rare breed. We are out there, waiting to help dogs like this. The problem is there are just so damn many of them, we often already have one or two that we are working with.
A dog who has snapped or nipped or shown aggression is not a lost cause in 99.99% of cases they just need time, patience and understanding and a handler willing to put their all into helping them.