Went with a couple of colleagues during one of my frequent business trips here to Sao Paulo. One word: delicious. I'd heard good things about this place and I wasn't disappointed. Really enjoyed the ambiance, definitely quite cozy, excellent service, and I/we will be going back.
Anything that could be improved? OK, the wine list could be more extensive, but a minor comments as I was happy with what was there and enjoyed a really good Malbec with one of my coworkers. A couple more dessert options wouldn't go amiss either, OK, but I don't normally go for the sweets but I was tempted by the chocolate mousse and I wasn't disappointed.
Good humor of the staff? Absolutely, and they joined in the jokes of my colleague when he feigned indignation about his entrée after he'd cleared his plate.
10/10, really great place, and that's saying something given the choice of selection in Sao Paulo.