Posting here also, since my post was removed from Head-Fi. Censorship is a real thing.
Recently reviewed a IEM for Penon, bought at 50% discount the ISN NEO 5. After it was shipped the Penon owner Chi contacted me, complained about a earlier product I had reviewed for them(EST50 bought full price).
Since I compared it to my reference set that was better, I got asked to not use better or more expensive IEMs this time. This he came with after it was shipped, if he said it beforehand I would have declined the review offer.
Also a note about Penon/ISN IEMs and cables, they do not have the best quality on the 2 pin sockets. Some are to tight, others loose. I have lost both my FAN and Serial in the floor many times. While the new cable that came with NEO 5 is to thick for some socket, and would expand them.
Rant over, just wanted it out one place its not removed. Do not think I will ever buy a product from Penon anymore, might even sell of my current ones.