This is the 4th season of our successful collection Madrid-Barcelona (MAD-BCN)! So you'll see again Berta and Albert in a very funny and entertaining story for our high B1 and B2 students (intermediate and high intermediate). You may not find the lessons really difficult for the vocabulary we use, but for the irony of some situations and for certain kind of very common expressions.
We hightly recommend you to start with the 1st season B1 (http://bit.ly/p6w5q9) so that you know what's going on in the story.