I had one, took him in when he was about 6 months and thought it would be fine as I already had a 6 year old dog and had grown up with dogs. Oh how naive I was.
On the whole he was fine, learned commands quickly, didnt seem to have any issues with separation anxiety which I put down to him being with my older dog. Very loving towards me and fine with visiting family. But he hated men. He was so smart that it was scary. I had to childproof my home long before I even thought of having children, as he could break into the fridge, bin, anywhere he fancied really. I had a window open but on the latch and he worked it open the rest of the way, jumped out the window and chased my neighbour across the street. Poor neighbour had to swan dive over a hedge to escape.
Back to the separation anxiety, he was absolutely fine anytime I left him in the house but once I had to go away for work and left both dogs with my MIL (who he knew very well) and he ate her sofa.
He was also extremely strong and his tail was like a whip. And the hair! It doesn't just cover your clothes/fabrics, it penetrates the fibres in such a way that you can't just brush it off, you have to pick it out.
I don't regret having him at all and still miss him but I would never take on a breed like that again without a load of research and possibly some practice.