Start with the understanding that KwickFit is not a CAD or CAM tool. It's a "what-if" calculator that allows you to quickly calculate array and panel layouts to see how they affect part-per-panel yield. KwickFIt makes it easy to adjust the numbers and see how they impact the result. When viewed this way, you'll find that KwickFit is a very valuable tool and quickly pays for itself.
Two of the most powerful features in KwickFit are the Auto Matrix Array Calculator, which finds the best array design for each panel size, and the Analyze Part Size to Increase Yield feature, which finds the threshold at which a reduced part size increases the parts-per-panel yield.
If you are a PCB designer get the list of your manufacturer's panel sizes, part spacing on the panel, and minimum panel borders. Do this for each of your preferred manufacturers. Then create a panel set or multiple panel sets with these panel sizes. Early in the design process, check how your PCB will be panelized. If your part will be manufactured in an array, use the Auto Matrix Array Calculator to find the best array design. Then use the analyze the part size to increase the yield feature to see if a slightly smaller part will produce a higher part-per-panel yield. Often, significant savings are just a millimeter away.