Zaino may not give your the best and deepest shine of all the products out there, but out of all the products out there, it is the easiest to put on and off, and lasts considerably longer than most. Did my car 2 weeks ago using the ZPC to get rid of the swirls, Z5, then the last coat of Z2, and think it came out pretty darn well:
and a few pics of the DD:
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Oh and I do everything by hand not b/c I think it's better, but b/c I'm too cheap to buy a PC. And since I only have to go through the whole process once a year, there is no point (usually an occasional coat of Z2, Z5 when I think about it or there is a special occasion coming up).