All in one products generally have cleaners, fillers, glazes and a sealent in them so they do alot of work to improve a paint finish. Granted, claying and machine polishing is the only way to get a genuinely swirl free finish but I've seen some awful finishes tranformed by just using megs tech wax! Plus, ingnorance is bliss, once upon a time, a sponge, chamois and some cheap turtle wax was good enough for my eyes. Car ownership was so much easier and cheaper back then;)