Klaus's apartment is clean, quiet, has everything you need and best of all, in the best location. Walking distance to hundreds of restaurants, cafes, shopping and more. There are several popular restaurants just right outside his building. Some of the best vegetarian restaurants we enjoyed, all within walking distance, were: Rasoterra Bistrot-Vegetaria (upscale vegetarian and delicious for all types of eaters), Flax & Kale (hip flexitarian food serving breakfast, lunch, dinner), Vegetalia - Gotico. BEST sweets bakery, Chok, has amazing cupcakes and many vegan options. The Four Cats restaurant, is where Picasso used to hang out. They have fabulous gin & tonics and a tasty tapas menu.
A fun excursion we did as a family was a graffiti art bike tour. It was fun learning all about the graffiti art in Barcelona but it was also a great way to get a tour outside the city.
We highly recommend staying at Klaus's place and we would definitely stay again.