It seems like one of those numbers (12 slots to start; 30 at most with large bags) must be off. 30-12 = 18, which isn't evenly divisible by 4. Maybe 32/28 at most, which would be 5/4 slots per (large) bag? Also, I wonder if they'll follow the WoW paradigm and have different sizes of bags?
WOW look alike
This is starting to look way too much like WOW I was hoping it would stay to being its own game but for some reason this inv. looks a lot like wow as well as the main screen as well.