I adjusted the height close to where I want it, went to the alignment shop, the tech interviews me to see what kind of driving style I have, corner balances the car, aligns according to my driving style (street, novice track, experienced track, pro track), readjusts height and corner balance, readjusts alignement, then back to the corner balance to readjust height at each corner, then align, then adjust height, then align, then adjust height... the whole process takes about 3 hours to get right...
Makes a significant difference in how the car feels, how it reacts, how it grips makes the money spent on coilovers worth it
IMHO if you have coilovers, take advantage of the fact that you can corner balance it... if not get a matched spring and shock (cupkit) since it'll be corner balanced already and set...
if you're getting coilovers to readjust the height for the winter... just corner balance and take note of the height so you can readjust back to that height...