They're probably not the nicest fabric, but it's not a bad price for such large curtains and the fabric is definitely acceptable.  We actually only needed one because we're using it as a room divider for a home theater, but we actually put the curtains back to back so it's colored on both sides and it works great.  My wife thinks it looks like a bit like a shower curtain because of the rings at the top, but that's just the style of curtain it is, and it slides very easily on the curtain rod.