I choose Guu as the location for my birthday this year. Despite the fact it was -10 degrees and snow was blowing in every direction, my group of 16 made the trek down there. I was so excited to go since I had heard so many good things about this place, so excited that I had placed an online reservation two weeks in advance. Their reservation policy for weekends is quite strict, reservations can only be made for 5:00 and seating is limited to 12 people if I remember correctly. The restaurant called me two hours before 5:00 on the day of and when it became apparent my group would not make the reservation on time, their staff was willing to put us on the waitlist for 7:00 for a bigger group with no problem. When we arrived, we were seated immediately despite it being a Saturday night.
Now regarding the food, what I remember most notably was the fried chicken which everyone at our table agreed was excellent. The fried brie was also great and the cheese had the optimal temperature and melted consistency. I really can't wait to be back with a smaller group and sample more of the menu. Awesome dining experience and so much more fun and casual than a sit down dinner with appetizers and entrees.
No split bills so remember the cash, or be prepared to be very generous!
Sidenote: I read a lot of reviews hyping up the washrooms. Maybe I visited the wrong ones but they were just alright, albeit very clean and rank just "ok" on my non-existent favourite washrooms in dining establishments list.
UPDATE: I was here for lunch and it was great too! Loved the sake mojito and the fried chicken lunch set I got was huge and so delicious. The general consensus among my friends was very positive.