FULL DISCLOSURE: Over the years I've tried 'em all foreign and domestic - even lost 43 Bitcoin (currently worth 65K each) back when Mt Gox 'collapsed' back in 2014.
But - I comfortably landed on https://pro.kraken.com a while ago, and have had NO REGRETS. Great protections, attitude... and API. Solid platform. 👍
@tw33k I tried them for over a year. No Bueno, not gonna go into the details, but nope.