I would strongly recommend that you choose 23andme instead of decodeme. 23andme is less expensive and enjoys a far better reputation as far as admixture analysis is concerned. 23andme costs $399.00 while decodeme costs $985.00.

http://dna-forums.org/index.php?showtopic=4984

http://dna-forums.org/index.php?showforum=26