I'm not currently preparing for a coding test, but since I learned the data structure part with only theories and a few simple examples, I didn't really understand what was being said, so I started taking the course because I wanted to learn by solving problems. I've listened to a little over half (60%) now, and I'm sighing every day, saying, "Bubble sort was like this?" "BST was like this?" Even if you don't need the skills to solve algorithm problems such as coding tests, if you, like me, don't understand data structures well with just theories, you should definitely listen to it once! I highly recommend it.