I used to ignore CSS generators because I thought that there isn’t any use for them. This happened before CSS3 when I didn’t need a generator to create something, however with the gaining popularity that CSS3 had, I had to move towards it and start learning it to adapt to the new standards as most web designers did.
These are very interesting tools which can help you a lot when wanting to learn CSS3 faster. Although most people don’t use them like that, instead they use it just to… well, generate CSS code.
It’s not a crime to generate CSS code, a lot of people are also using CSS generators because time is really important and these tools save a lot of time. Imagine that there’s a CSS generator for almost everything: border generator, background generator, box generator, gradient generator, shadow generator and the most popular buttons or menu generators.