I came around 6:30 on a weekday and there wasn't much of a wait. Perhaps this means the hype is dying. You come here mainly for the experience. Maybe a gimmicky way to get people to pay for an overpriced bag of boiled seafood but it was quite fun. Everyone gets a bib and gloves, though I think they should give you a box of gloves as they get soaked pretty quickly!
My favourite sauce is Captain's Boil, though the garlic one was quite good as well (very heavy on the garlic and butter). I think the price for the mussels and clams is OK, but it does get expensive when it comes to lobster/crab. The truth is - boiling seafood in a bag of sauce is extremely easy to make at home and the premium on lobster/crab could be better used on wok fried styles that you can't replicate at home. The food was good though, so next time I'll get mussels take out as a snack. As expected, seafood is costly to get full from.