I dont even bother to align it or put it up in the air. I plug in the Freeview box and it sets itself up. The old omni was worse than hopeless in my opinion, i had it on 4 vans and every one was rubbish. The 530 is a quantum leap forward. at last they got it right.
I've no experience of the 530 but IMHO you'll have to go a long way to beat the old fashioned aerial on a pole (it's a lot cheaper too, even if it's not so convenient).