Admittedly the food is great but also on a pricey side (this is probably some of the most expensive ramen in Sydney). The soup stock is exceptional. The wait staff are generally lovely although if you ever have an issue that is brought to management, you will meet with arrogance. I think they know they're popular restaurant, and thus don't see a few disappointed customers here and there as a big deal; but only time will tell. Ensure that you ask where the queue for getting a table starts and ends, as we accidentally cut in front of a few customers who were lining up at the "Take Away" sign, not realising this was actually a continuation of the exceptionally long "Dine In" queue. 30 minutes of waiting later, management insisted that we "should have known" that it wasn't actually a takeaway line because the restaurant had been around for quite some time, but it was our first time there so what gives hey?! To avoid the disappointment we experienced, also ensure that you get them to add your name to a notebook they've got tucked away somewhere - in addition to waiting in line - because if you don't (it's not obvious but it's somehow your responsibility), you won't get a seat. But if you can get through the massive and totally counter-intuitive queueing system, the food is quite actually good.
I admit, I am a bit of a ramen snob and I was a bit skeptical of the hype surrounding Ippudo. My husband and I popped in one day only because there wasn't the usual line outside. We ordered a ramen, some pork buns and a prawn bun to share, and I must admit I have been won over. You can order your ramen noodles any way you like - extra hard, hard, medium or soft. The noodles are great but the soup is even better. It is expensive for a bowl of noodles, but it's pretty damn tasty. The pork buns are delicious too. Some say it's better than momofuku.
The restaurant is noisy and you might have to share tables, but service is efficient and friendly.