I don't know anything about the immediate horses on the papers, but I personally love Skipper W and Poco Bueno horses. Both lines are known for phenomenal ranch horses and being incredibly strong and smart. I personally own a Poco Bueno mare and have bred her to Skipper W studs, offspring has been consistently well built, smart and really nice temperaments. Might just be the way we raise them, but each one started under saddle has been easy as can be and has never bucked (knock on wood that it stays that way). It may also be luck, but I have never had lameness issues or any kind of health issues with these horses, had plenty of problems with the paint horses. People need to stop breeding for color and pay attention to feet and conformation! Oh, and some paint horses end up bat crap crazy from this too. Ok, mini rant over.
I have never owned a Poco Bueno or Skipper W that was hyper and I could ask them to do just about anything I they did it without hesitation. Only problem is they are smart, sometimes smarter than their owners which sometimes leads to them quickly learning bad behaviors.