I've been to Guu 4 times because I love their food! I loved everything I tried there, my favourites are the seaweed/mushroom rice and the pumplin with an egg in it. It's so unique and the flavours are wonderfully meshed together.
I even celebrated my birthday there. I bought the 'cake + song' on the menu and a group of them were singing to me in English and Japanese and dancing (haha). It was great fun to have my birthday there.
Not to mention the way they greet you when you enter! Full of energy and enthusiasm. I love it.