Our breeder suggested doing this and we, as first-time dog owners, felt that her experience would be useful. She seemed to have a lot of knowledge and experience, and a genuine love for her dogs.
She spent time getting to know us when we visited twice and asked us lots of questions. She then watched as the pups developed and told us which one she felt was most suited to our family and experience.
I am certain that she made the right choice for us.
However, if I had more experience, then I would expect to be able to judge for myself.