Welcome from me.
I came to the H480 18 months ago as a continuation from flying a P2V+ which, incidentally, I still fly...for now.
You'll find that the H is a different king of flying experience that what you are used to with the Phantom. But flying the H is beautiful. A pleasurable experience once you get the hang of it. Since you already have experience flying a Phantom you'll soon pick up on the H.
Top Tips
Do all calibrations before your first flight; If it has an older firmware version don't rush to update it...it'll fly just fine with whatever firmware version it has; Always land before the first low level battery warning; most important, have fun.