I think Cody is a great platform to improve someone's coding skill. Although I was familiar with MATLAB since my undergrad, I was not very good at it. So when I first started using Cody, I was finding it difficult to solve problems because of my lacking of programming skill. So I completed the tutorial MATLAB Onramp and then solved the problems of MATLAB Onramp practice. After that, I was able to solve problems from other problem groups. I do not care what the leading solution size is and if my solution is much bigger than the leading solution as long as my solution works fine. I can feel that my programming skill is improving day by day. I have tried a few other online courses but no other platform or online course has overcome my fear of coding as Cody did.
And I think it is actually helpful that I can't see others' solutions unless I have submitted mine. If there was an option to see solutions beforehand, I think I wouldn't have tried on my own the way I do now.