My number one reason to speak more clearly in English is to communicate effectively with people, so it brings more job opportunities. I struggled with speaking more clearly in English. I was very frustrated and it had negative impacts on my job.
I was absolutely blown away of how easy, how convenient, and how systematic it (the course) has been structured. After about 2, 3 weeks, I started to notice that I had made progress on pronouncing multi syllable words. People responded better to my messages, and were more likely to communicate with me. That made me feel more confident.
So it helped me to do my job very effectively, which was exactly what I was hoping to achieve.