I did my research before my trip to see the various traditional handicrafts Peru is known for as I always pick up art to decorate my home with. I knew I wanted a retablo or two and from Trip Advisor found that this store is known for authentic crafts including a good selection of retablos.
The owner takes pride in the fact that her store is 95% handmade crafts and her prices are reasonable. I went here the day after I arrived in Peru and picked up two retablos and with the exception of a couple of small boutiques including the upscale retablos at the airport (very pricey) I did not see better retablos over the next 2 weeks. My time was taken up by all my sightseeing and activities which didn't allow for much small store/boutique shopping and you won't find retablos as nice at the markets.
There are so many items you are bound to find something you like. I saw her personal collection of art which is very impressive. If you pay with cash you will get 10% off but they do take credit card. I got a large retablo (baby jesus with towns people) for approx $200 US (17x16 inches), and small retablo (women shopping) for $40 US (6X5 inches). She had easily over 50 retablos with various shapes, scenes and prices. They were wrapped very well to take back home.
The shop is a 5 minute brisk walk from Dedalo, another highly recommended shopping complex in Barranco which has more modern items. If you want traditional however, this is the place to go. I didn't have the time but Barranco is very bohemian, a colorful neighborhood I wish I would have had the time to explore. Barranco was a 10 minutes cab ride from my hotel in Miraflores.