I agree, knowing people and stories is best, but we have no leads to go on to find who we are related to on my Dad's side, and he really wants to know. You still have to figure out the connections using traditional genealogy because otherwise the results are just what the lab says.
But David Cohen is an extremely common name, we haven't even been able to identify him for sure in the passenger lists, and my dad decided to splurge. I have friends who have found it an incredibly helpful adjunct to their research...and NO, I don't own stock in any dna company.

Unfortunately, all the older people on dad's grandfather's side are gone, and they didn't like talking about the old country, so there's very little to go on. Not even old photographs or bibles on that side.