They are very cheaply made. Their trees are eitehr fiberglass (also sometimes called fiberflex) or soft wood. They don't always fit horses well and can warp/crack with use (or come out of th ebox warped...). All of the materials are low quality and imported.
You're much better off buying a synthetic saddle, like an Abetta, Big Horn, or Fabtron, or buying an older used leather saddle that is of a reputable brand name.