Hi shpongled, we make it clear on the site that all the data is from CMC. In fact, there are several links on each coin page pointing to CMC for more detailed info :)
Thanks for the question jamie. There are several features like bookmarking, advanced search/filtering, better night mode, better mobile support that are not available on CMC.
His filters are pretty useful, and I'd say the UI is just as complex as it needs to be. I feel like coinmarket cap has a clunkier UI with unnecessary tabs, a top bar that isn't needed, and an uncentered list on the homepage.
I like the URLs can be saved with parameters so you can bookmark specific filters. CMC is lacking in this specific aspect. Your site is how CMC could be designed so it is easier to use. Thx.