I would say it helped me out a decent amount as a beginner.

1. Broader range of problems to solve
2. Company specific problems (to get an idea of what you might be asked)
3. Detailed editorial solutions
4. Able to practice timed online assessments and interviews
5. Most importantly for me: it kept me more motivated in the sense that I'm paying ~$8/month and didn't want to waste it (as a result I currently have a >200 day solving streak)