Was just coming here to post that. I have been following these mattress companies for a while now. Very interesting stuff in regards to properly disclosing relationships, companies trying to bully their way into good reviews, companies trying to control content the reviewers put out, how honest reviews really are, etc.
Purple Mattress also sued a guy claiming the white powder on their mattresses was harmful. Turns out that reviewer used to work at Ghost Bed and still has connections there.