Freud is known for a quality product. Working a lot with projects I am happy with paying for the SD model. It delivers a crisp clean cut as promised in the Super model. I use a portable Table saw which restrictes me to a 6 inch blade, instead of a 8" inch. I also have to keep with a traditional dado. Really, once you start to use this set. Freud makes it simple even with shims U can tell its well thought out and put together tool. I would have to say the only improvement, thus far is the case it comes ion could be little less generic in design, but then again its not bad and makes the set more affodable. Also, Amazon makes it easy on the sweet price and delivery as usual!