I have eaten here twice and it is okay, average, nothing spectacular...
The service is really good...The waiter explains the popular menu items and goes through everything, even the specialty drinks. You get bread and a cilantro-esque dipping sauce. One of the two times, I also got pickled veggies.
I got the lomo saltado on trip one, a beef stirfry with fries and rice...it is good, enough food for 2 meals, but slightly oily. Tastes good reheated! The second time, I got the bistec - steak with grilled onions (big chunks), tomatoes, rice, fries and plantains with a fried egg on top. I did have to ask for the plaintains as they were forgotten, but when I got them they were hot, sweet and delicious. The fried egg is a nice touch.
The prices are high (approximately $16 for a dish) but it is worth trying a new cuisine. I think each entree could feed a normal person of either gender for dinner and lunch the next day. I just don't think my two experiences and the experience of my new-to-Peruvian-food dining companion warrant another trip.