It´s a wonderful street to take walk, even when it is completely crowded. It has a lot of trees where you can hide from the sun and you will find a lot of stores, bars, cupcake stores and in the streets near by a lot of juice shops and Cafés to take a break.
You will be 2 steps from Gran Via, in front of Calle Montera, in the heart of Madrid. So if you want to shop and do anything you want after, it will be practical cause you´re close. Besides you will find a lot brands like Birkenstock, Michael Kors, Furla, Mango etc...
Be patient, some times it is reaaaaally crowded.