I ended up taking this course almost by force (?) because my company suddenly started using Spring, but looking back, I don't know what I would have done if I hadn't taken it. I wasn't a complete beginner to backend development, as I had experience with NestJS, so I was worried that Spring might feel too heavy or frustrating. However, those worries were completely shattered from the very first lecture. The flow—from Spring's philosophy to its architecture and why it was designed this way—was so smooth that I lost count of how many "Aha!" moments I had. It doesn't just list syntax; it builds the practical intuition and fundamentals needed in the field. Even coming from a NestJS background, it was great to understand Spring by comparing the two. I can confidently say that for those new to Spring, as well as those like me who have experience with other frameworks but have never properly learned Spring, this single course will completely wash away any vague fears you have. It's hard to find a better course than this for solidifying your fundamentals.