I’ve had a really great experience using HackerRank to prepare for coding interviews. The problems span a wide range of topics and difficulty levels, which makes it easy to build my skills gradually and stay challenged. I also especially liked the coding environment and the instant feedback on submissions, since it made practice sessions smoother and more efficient. Review collected by and hosted on G2.com.

Overall, I had a positive experience. My main suggestion would be to provide more detailed explanations for some coding challenges and failed test cases, as that would make it easier to learn from mistakes. Review collected by and hosted on G2.com.