The benefit is questionable in my opinion, because we don't know the effect of lots of SNPs. Or how they influence each other. The same is true for the SNP analysis that companie like 23andme offer.
@WYSIWYG I didn't want to say 'stupid'. It sounds a little rude,though that's what I felt. Well under what reason can I flag it? I went down till 'Off topic' but couldn't find anything suitable.