I went there with a couple of friends to try the famous cuy. Because everyone says that this is the place for it we just went.
The lady that serve pur table was terrible! She really didn't want to work ,was very reluctant to any kind of explanation...luckily for us after the first 2 visit at our table the manager took over.
To have your cuy you have to wait 1 hour (many locals book it ahead) we just thought to share some starters that were not amazing honestly.
The the cuy came. It was very tasty,fatter than what i thought (but that is what i was expecting vs reality) and heavy seasoned. But this is how they it here.
So a suggestion for foreigner eating here: or try it in the morning or ask for a canelazo (a alcoholic very digestive drink) after... or even the 2 combined.