This place rocks. Yes there is always a line (about 50 minutes for 4 people), yes it is the tiniest space (say hello to your neighbouring tables.. or sit at the bar - definitely more space there!), and yes it is quite loud, but the food is so delicious!
It is a Japanese pub-style after all so it's good idea to order a bunch of stuff and share (you may not have space on your table for it though..). My favourite was the grilled pork neck (with what I think must be tare sauce) - be forewarned, it's messy, and it will be because you will be gnawing at it to get to ever last yummy bite! They also serve chicken skin and chicken cartilage yakitori which is awesome!!
The lunch menu is a little different - a smaller menu that you can peruse as you're waiting in line (can't get those awesome skewers, and yes there will still be a line) but equally as good. The ramen is delicious (the super happy guy behind the bar - who my brother thinks must be the owner - says that they make the noodles themselves - kudos to them; they truly are delicious!) and so is the 48-hour pork rice dish (melt-in-your-mouth onions...). They are also very efficient with getting the order to you quickly.
I did find it a little bit pricey, but the quality is good and the food is well-prepared and innovative, so I think that is worth the price.
Go, definitely go - the wait in line is totally worth it! I wish I could be back there right now :)