I bought this insert to use in my DeWalt 746 tablesaw and have found it to be a very high quality accessory.  When my insert plate arrived I was pleased to note that it was dead flat!  Installation was very easy - using the four leveling screws I was able to bring this insert perfectly level with my saw table all the way around.  Once adjusted, the side-to-side and front-to-back adjustment screws took all of the play out of this insert.  I also appreciate the smooth surface which allows my stock to glide across it with little effort.  The finger hole allows easy and quick removal for blade changes, etc.  My only complaint is that I wish it were yellow.  Mine is bright orange, but I can live with that!