Stumbled upon Nana Saturday while shopping in the Queen West area and being a Thai-food lover, was surprised I haven't read about Khao San Road's sister restaurant. There were two tables left at 6:30pm and we were asked if two of us minded sharing a communal table for four or sitting at the bar, we opted for the former. No issues bumping elbows or anything, there was plenty of space for both parties.
The decor is full of colourful street art and service was prompt (15 minute wait for entrees and drink served within 5 minutes). We ordered a Thai Iced Tea (practically tastes the same as KSR and Sukho Thai), Pad Thai Bolan (means "authentic") and Yellow Curry with coconut. While none of the dishes we ordered were spicy, they provide a spice rack of four different iterations of chilis/chili sauce for you to flavour dishes yourself. I quite enjoyed this as it allowed you to blend as much or as little as you wanted.
The Pad Thai with Beef was a little salty for my liking but the portion size was spot on - I find at other Thai establishments I can never finish a Pad Thai but I was definitely perfectly satiated here. The Yellow Curry with coconut had great flavour - the coconut milk underbase was not particularly overwhelming but just right, and both dishes with a bit of chili made for a great meal. Didn't really have room for dessert but after reading promising things on Thai Iced Tea gelato, will definitely come back for it.
Overall my experience was not plagued by service issues as others have noted, but the food here as compared to Sukho Thai or Khao San Road is not extraordinary enough to entice me to venture further west into this area. If you're ever around after a day of shopping, give Nana a try!