I've had my Bosch table saw for a little over 3 years and use it every week in my carpentry business. It has yet to disappoint me. Up until now I had not purchased the dado insert because of some of the poor reviews. I had made my own insert and have put up with the struggle of using it all this time (I had to screw it in each time and place washers underneath to make it flush). After my last frustrating effort with my homemade insert, I decided that at $13, Bosch's dado insert couldn't be any more frustrating than using my own homemade one. Boy had I been wrong (and the reviewers that I had listened to). It took almost nothing to snap it in and adjust it to level. Those are the ONLY instructions that come with it - in three languages. Woohoo! The hitch came when I needed to cut a wide dado. This is where the additional instructions would have been helpful (and would have kept some of the reviewers from giving it low marks). On a wider stack you will need to remove the inner arbor washer and replace it with the outer washer, then put on your stack of blades. I would rate this 5 stars if they would only give you this small, but important, bit of info with the package. Even the instruction book that comes with the saw when it mentions working with dado or molding heads doesn't tell you this. All it says is, "Instructions for operating the Dado and Molding Heads are contained in the booklet furnished with these accessories. ALWAYS USE APPROPRIATE TABLE INSERT LISTED UNDER ACCESSORIES." Hmmmm, neither set of instructions tells you anything about swapping out the arbor washers. Fortunately I was able to figure this on my own. I wish now I had been using this from the get go and had not been influenced by negative reviews for so long.