William- my opinion is different from that of other people who have posted here. I purchased autosomal testing from DNA tribes, Y testing from Family Tree, and recently autosomal testing from Family Tree (for confirmation).
The autosomal approach uses different loci than the Y dna approach or the mitochondrial approach. The legal guys use the autosomal approach for crime scenes and paternity testing. That means it will hold up in court. Pretty good argument in favor of it, right?
The autosomal approach, as I understand it, is better for nailing down recent ancestry. If your family tree has a question mark in it at the grandparent level, why not use it?