Games very well thought through. No bug. Very easy to use. Great to improve yourself on algorithm and coding skills ! Competition really interesting.

I love the Clash of Code feature, that allows me to spend no more than 15 minutes on a short challenge. After regularly using this feature I found myself using new tricks that I learn while using it. I've learned the latest syntax updates of Javascript (language I use professionally), I was able to refresh my Python skills and I learned a couple of tricks in Bash as well.

Improving coding skill. Having fun with code. Competive coding with very fun contests.