i DID go to OP ONCE, about 9 years ago over CNY.... my cousin waited for mcd's for over an hour to get something to eat... the rides, forget it... you'd be lucky to have 2 rides all day...if you like spending hours waiting in line, then go. if not, stay well clear of OP & Disney...
when Disney first opened, they sold out of tickets over CNY...mainlanders were scaling the fence to get in! it was ridiculous!
you REALLY couldn't pay me enough to go over the holiday! remember, mainlanders get an entire week off and lots of them travel during that time... many to HK...