I've been here twice since its opening and it seems like the food quality varied between the two visits. I've been to several Guu restaurants in Vancouver and Toronto and even though the menu is more or less the same, it all depends on who is cooking the dish (sometimes it's greasier/saltier/soggier and sometimes it is just perfect). Regardless, it's usually a fun place to have a birthday party for larger groups.
The dish I can never go without is the kabocha korokke. When done properly, it's crispy on the outside and creamy on the inside with a tiny quail egg hidden in the center and dipped in a flavourful mayo sauce. The Kakimayo is also a favorite of mine in the winter. It is very much like a rockefeller oyster. It comes out piping hot, so don't burn yourself. It is a very filling portion. The karaage (crispy chicken) is nothing special, it's just fried chicken. The kabocha zenzai dessert is a bowl of soft/mushy textured Asian desserts overlying pureed kabocha that will not suit everyone's taste. The best option is to pick items off the day's special. I always choose 2-3 items from the list and have never regretted it.
The reason I didn't rate this place higher was because I once arrived one person short in my dinner party and the waiter literally gave her spot away after 20 minutes (even though we had started ordering) and we had to argue to get the seat back. It made for a very stressful eating experience.
If I have the choice (ie small party of less than 3-4 people) and the patience to wait more than 30 minutes for supper, I would always choose to go to Kazu down the block, but Kinka is a very decent alternative for larger groups and impatient people.