Tasty and Authentic
They have a generous selection of cookies, all of those made inhouse with Canary islands' typical raw ingredients. I'd say you'd better ask the nice staff at the shop to get an overview of the flavors offered, some of the recipes are so particular you'll be amazed!
When I was there, they had samples to offer and it was a struggle to pick one to finally buy. End up with 3 boxes for me and some friends at home (enough crappy souvenir, everybody loves cookies).
Definitely recommended, If you plan a trip to Gran Canaria, hit Meloneras, pay the guys a visit and be prepared to come