I have used Zaino and love it. I've also used Menzerna, and agree that it is easier to apply. This last detail session, I did Menzerna for the early stages and then finished it with Zaino (2 I think, could have been 4) and then Zaino CS. Looks awesome. I tried to take pics but my phone camera really doesn't do it justice.
I applied the early stages with a random orbital, and the Zaino finishing polishes by hand with a cotton applicator.
I also really like Zaino's other car care products, like their leather conditioner.
Attempted phone pic:
Most if not all of the imperfections in this pic are cloud reflections, not swirl marks: