I used Bittrex, Coinbase Pro and Kraken. The latter two for about 95% of my trades. Kraken’s non-beginner interface could be cleaner and more intuitive, and I’ve had order issues with all 3 exchanges during periods of extreme volatility, but that doesn’t seem like something that’s escapable anywhere.
I’ve been meaning to spend more time on FTX, as they appear on the upswing.