One of the best experiences I have ever had at a restaurant. The food at at Kay Pacha is truly Peruvian and can not be compared to any other spot in the city.
Decor/Ambience
The bright space welcomes a casual attire but feels classy without trying. The bar is great if you are going out with a friend for a cocktail and the tables are an excellent choice for a date or a large table. I think anyone who appreciates good food would feel welcome.
Food
If you really want to enjoy yourself, please consider:
Cassava Fries/Yuca Frita (good for two people)
Empanada de Carne (unlike anything I've ever had)
U10 Scallop (ridiculously flavourful, sashimi grade)
The Ceviche (mandatory, pick anyone, you won't be sorry, thank me later)
Pulpo al Olivo (may change your life)
I personally would order a bunch of smaller plates and one large plate (Don't forget about The Ceviche).
Cocktails
The cocktails were insane and I felt pretty good after one. Perhaps that's why we ordered a second. We ordered two. I forgot the names already but it's okay because everything here is truly phenomenal.
Price/Quality
Extremely reasonable considering the quality of each and every dish. You can see the kitchen. Between the two of us, we spent less than a hundred dollars.
Other Tips
Highly recommend this place if you are going for a date, dinner with colleagues, meeting your in-laws, groups up to 6-8 people and even if you are down to go alone. I would budget 1 hour to 1.5 hours so can pace yourself and enjoy yourself.
I recommend making a reservation.