What it is
A trade forum for people who train clients for a living. Threads run to which certification is worth it, how to handle a client who will not do their homework, and whether a given gym's commission structure is a scam.
Best for
Sanity-checking a decision against people with no product to sell you. The honesty about pay and working conditions is hard to find anywhere else.
Watch out for
Anonymous forums reward confidence over expertise, and the tone runs cynical. Good for perspective, poor for anything you would call evidence.