Went there with another couple, upon their recommendation (they are Peruvians living in San Francisco). We had a reservation, which was handy, even on a Tuesday evening, as the place was packed.
We ordered Piscosours, which were well done. Lacked the frizzy icicles you can taste on the truly exceptional ones, but it had a good balance of kick, sweetness, and sourness.
Ordered a few plates that we all shared: half chicken a la brasa, very good, tasty; lomo saltado, which tasted very good, although i prefer crisper french fries; seco de res, which was very good, and freshly prepared; fried yuca, which was so good that we ordered some more; tacutacu, which hold its ground but does not deserve to be called epic (they were not aspiring to that, as it appears as a side dish); aji sauces trio, which was probably one of the best 'dishes'.
All in all an excellent Peruvian experience, which is difficult to have outside Peru. Living in Boston, I have no options that can come close to this.