In a nutshell,
What are they like(Trainability, temperament etc.)?
And would you recommend one to a beginner(I'm going to say more of a no because of the whole "Terrier" mentality, right)?
I actually know of two local Sealy breeders. They are nice dogs, still terrier, but on a scale of 1-10, I'd say about 4 in intensity. A bit more laid back. I don't buy into 'terrier mentality' when it comes prospective to ownership, however.