Yea, it's true they were not "just like" modern humans or the Cro-Magnons who lived contemporaniously with them. There are still ?'s about how they died out, if they had kids with our ancestors, and to what degree they borrowed from early H. sapien culture and became more advanced in their own material culture. It would be really fascinating though if scientists determined that there people are alive today with even a very few Neanderthal herditary traits.