During our cross-promotion with Qobuz for our PM-50 Planar headphones, they have offered to review them on their official site. Here's a few excerpts followed by a link to the full review.
"At $500, these headphones are a competitively priced planar magnetic design yet still firmly within the luxury product category."
"We would particularly recommend this headphone to those who prize a neutral frequency response."
"Overall, we would recommend Andover Audio’s PM-50 headphone to music fans who appreciate subtlety, refinement, and neutrality in their headphones."