This is NOT 4th edition material and is in the wrong category. Yes, it can be adapted into 4th but so can any 3.X material.
Otherwise the quality was quite good. If I had been intending to buy material for 3.X, I would consider this a very good product and would have rated it 4 stars (too much of the material was ads to rate it 5 stars). But listing it under 4th edition and having to do fully manual conversions of the contents to make it work for 4th edition gives this a one star rating.