The space is beautiful! It's really sleek and modern and you feel like you stepped into an episode of Sex and the City. The food is good depending on what you order. I went with a large group and the overall consensus was "meh..." I was the only one who ordered something that was really good: chicken liver pate as a starter and gnocchi as my entree. For me, I had a great food experience, but everyone else felt their food was just ok. Nothing special but very expensive. Everyone had a taste of my dish and agreed it was excellent and wished they had ordered it, but I think when you're in a group of 13 people and only 1 of the 13 thoroughly enjoyed their meal...indicates to me that the menu may need improving.
Where Sassi did shine was their desserts. The salted caramel chocolate brownie, the butter cake and the flourless chocolate cake was DELICIOUS. So I'd recommend this place for drinks and dessert, but perhaps avoid dinner unless everyone orders the gnocchi!
Service overall was good. He was friendly and attentive. Some issues arose around billing, some people were charged for items they weren't responsible for and he was reluctant to remove from the bill. In the end he accommodated. Like the meal, there was mixed reviews on how the group found the service.
So my personal experience was nice but seems to be an inconsistent experience with others.