These books are prefect for the price they contain the information as advertised. The Hardcover binding is excellent. For the price the glued binding is to be expected other than that these are excellent volumes and you can expected these to last one generation easily. These books if they had been sown would have lasted many generations. The print in these volumes is excellent there was a review stating that this was a problem this problem clearly has been rectified. I would have given it 5 stars if these books had been sown and not glued.
I picked up the TDNT in a used bookstore while in seminary and have never regretted it. Though a bit dated, it is an excellent tool for pastors and teachers. I don't use it for quick glances or definitions (there ar ebetter, smaller tools for that) but do use it for more in depth word studies. It is helpful to have at least some Greek training in order to get the fullest use from these volumes, but even a lexical knowledge level will go a long way with this set. For under $100, it is really hard to beat.