Do light sussex hens make good broodies and mothers?

Friend of mine has one and i am looking for a broody hen - she is currently broody and quite young. What do you all think?

They are meant to be good broodies and great mums, I am yet to test that out with my two.  I think I read somewhere (it could have been on here) the broody should have had at least one previous attempt at being broody before putting eggs under her.  
I'm thinking of hatching some chicks myself next time Princess Snow White goes broody, its very exciting!