The only reason I was looking online is because the online price is slightly less. But not worth the hassle if I really can't pick it up at the airport.

Yes, I know that there are too many companies, that's why I had hoped there was one site that could put it all together. I guess I should be happy that google maps seems to be able to put together the route.

Can't I get the $50 refund on the standard Octopus as well? Now that I think of it, I might just go with the regular octopus. If I am just breaking even with the 3 day pass, there's no reason to get it and possibly not break even.
A trip to lantau and new territories will add up to about 90. Depending on how often I take the MTR across vs the star ferry, it should get me the extra $30 to break even. I guess the advantage of the unlimited is if I'm too lazy/tired to walk, I might take the mtr one station.