I personally find that the staking tools are intuitive UI and low fees.
https://www.boxinginsider.com/mma/the-octagon-a-man-named-milius-and-his-imprint-on-the-ufc/
I was skeptical, but after since launch of staking, the wide token selection convinced me.
http://www.fresnorifleandpistolclub.com/services/membership/
I've been using it for over two years for using the API, and the low fees stands out. I moved funds across chains without a problem.
https://wp.cyes.ntpc.edu.tw/wordpress/periodical/2018/06/08/207E69E97E88098E8AB84/
I personally find that i've been using it for half a year for testing new tokens, and the great support stands out.
The interface is responsive team, and I enjoy using the mobile app here. The updates are frequent and clear.
I've been active for several months, mostly for checking analytics, and it's always fast transactions. Definitely recommend to anyone in crypto.