I'm convinced that PADI's OW diver cert is well enough to go diving in most tourist / tropical destinations. You can show that card basically anywhere and get an air fill. Their materials are very well written - very clear- with all the check-up quizzes spaced throughout the book.
Is Advanced Open Water even really advanced though? Meh. Not really, but they had to call it something. I did my OW and AOW back-to-back and by no means would I call myself an Advanced OW Diver after that.
If I had my way, I'd change it to something like OW 2.0 or something. I would lose the word Advanced.
I like that they introduced PADI Adventure Diver as an in-between class for new divers. If I remember correctly, it's just past OW, and not quite Advanced is how it's been marketed. Any chance to get fins wet while continuing their education, to me, is a smart move.