I'm glad it's well done - I was wondering about it. I hope that the recent one reflects new historical evidence about slavery since the original aired. I had heard that there were some cameos in the new one. I'll try to get around to seeing in sometimes soon.
I do recommend seeing the original sometime. It's dated, but well worth the time. And it's Levar Burton's first major acting gig. OH and Ian McShane shows up at one point, too. As does nearly everyone else who was sort of famous in 1977. And there was another miniseries based on the life of Alex Haley's maternal side, Queen, that aired in the late 80s or early 90s.