I liked the cover, it made me laugh so I bought it.
Then at the airport I tried to read it and was surprised by how much I understood. Of course with a comic you have the benefit of the drawings as well. I enjoyed working it out and what a fun way to improve my Spanish! Certainly beats saying phrases over and over.
Also if you are travelling I would like to pass something that many people have pointed out and I myself agree with. Phrase books are almost useless, the problem is you ask the question and then where ever you are they answer back in their language. At this point you think “huh”, flip through the phrase book and often for some reason repeat yourself. If you are going to ask questions from a phrase book try to make them “yes” or “no” questions, then you have a fighting chance of understanding the answer.