I went with a friend to Nota Bene for Winterlicious 2016. We booked the reservation about an hour prior and did not have any issues with the reservation part. It was really nice of them to seat us early as well.
Atmosphere
The ambience of the restaurant was pretty romantic.. so if you don't want to be sitting beside couples holding hands and staring longingly in each others eyes for the rest of your stay, I would definitely recommend coming with a bigger group so you can be seated in the larger table areas. It seems like a good place for a date as the lighting is dim and the whole ambience of the restaurant feels very intimate. There is a coat check and the dress of the restaurant is more on the formal side, so when my friend and I stumbled into the restaurant we definitely felt a little under dressed.
Food
The menu from the Toronto Winterlicous website does not 100% reflect the items they served for Winterlicious, so a note of caution if you're going specifically for something. The food was a little underwhelming considering the price that was paid. The food we ordered came cold to the table and was generally not very memorable.
Service
The appetizers came pretty quickly, but the wait between finishing the appetizer, main and dessert was definitely too long; about 30-40 minutes. The wait staff was not really attentive to our table and so were kind of left hanging on things like water, drinks, the bill, etc.