I don't know anything about those particular lines past what I've seen in the NRHA arena on TV, but he's had some success...not as much as some, a lot more than others. He seems to be a semi-proven sire and he is definitely from proven lines. I like his general look, though he seems to be really light boned in his legs.
NRHAreiner will be able to tell you a lot more about the temperament and ability of that particular horse because she's involved with the industry.
I'm going by memory her, and sometimes that's scarry, but he's been brought up here before, and someone said he carries the HERDA gene/trait... May have been HYPP, but I think HERDA
But, he is gorgeous!