IMHO, Numatic has the best cord winder on the market. Unlike many automatic winders, it won't whip the plug against the machine, nor does it require you to coax the last few feet of cord in manually. Because you crank it yourself, it just winds reliably every time.
The tools are another strong point. I have read criticism once (can't remember where) that they are too basic and not "ergonomic" enough, although I'd counter that by saying many cleaners past and present have had hose ends that were over-designed to the point of being an absolute PITA to use for above floor cleaning. With the Numatic kit, you can configure the straight and curved tubes in any combination you like, or dispense with them altogether and attach the tools directly to the hose end if preferred. Makes it a lot easier to attain exactly the right angle and amount of reach needed, so you don't have to perform contortions when cleaning in tight areas.