I've been a fan of Yann's since his concert at the Acropolis was first produced and have worn out multiple copies of it and the Tribute concert. I've also attended one concert in Denver.  Some of the "reviews" here are highly critical of Yanni, the musicians, the concerts, the color of the sky, the... whatever.  They are from pathetic individuals with nothing better to do than whine about anything and be negative about everything.  That being said, here's a real review.