My neighbor when I was in high school raised them and still does. Most of theirs are sold before they are born and quite a number have championships in multiple countries.
Every single one that I recall had to have their eyes and face folds tacked as puppies and some even retacked once or even twice more. They were also dog aggressive, leash aggro, and just to me seemed like a waste of space as a dog. They never really seemed into their owners - and were about as biddable as stumps.
At the boarding kennel we had a couple very attractive blues come in occasionally. They were nice dogs - not friendly - but not overly aggressive either. Both had serious medical issues with their eyes as well. The one also had skin issues and allergies that were pretty amazing.
You couldn't pay me to own one.