If you were like me and thinking if these people are out of their mind, waiting in a long line for a fish shaped pastry thingie, go ahead and get in the queue, and discover that it isn't all just hype.  There are 3 fillings: Red Bean (60 baht), Cold Custard (65 baht), Ham and Cheese (70 baht).  The counter is almost an exhibition itself for those waiting in line to get a quick look at how these Taiyaki are made.  I got a Cold Custard one.  The filling, by itself, maybe similar to that of a typical Chou Cream, but when have together with the crunchy brown sugar-coated croissant, it's a well-balanced wonderful treat in a bite.  So, does it worth queuing up for?  Yes, but it's a one-time thing for me, until the line finally dies down, considering many other great food options around with much less waiting, if any.  So whether it's the taste, kid-luring live demonstration or strategic corner location, this places always get mind-blogging long line. 
Oh, and don't mind the sign saying "6 pieces per person", it's actually 6 pieces maximum purchase per person, as written in Thai.  Pretty thoughtful of them to avoid those "I'll buy for all my friends" shoppers hogging all Taiyaki, so no one else can have them.