Best US Crypto Exchange?

I have researched crypto exchanges to support my trading activity. I find it challenging to compare exchanges on an apples to apples basis. I have actually funded an account with Kraken, but many times I execute trades I am leaving off a specific trade setting or trading the wrong pair, etc. Their user interface has to be one of the worst in the history of trading. And, do you think they'll ever add immediate funding with ACH? If it takes 3-5 business days to get my funds in there - makes it kind of hard to take advantage of 400% increase in the price of Doge .

Criteria in my mind:

1. Ease of trade execution - including basic stop-loss parameters and adding trailing stops after the fact.
2. Low spreads / fees
3. Ease of funding
4. Good mobile app

The time and effort is not insignificant to go through the onboarding process with an exchange. Any suggestions on the best options for consideration? Bittrex? Coinbase Pro? Gemini?

Hi, I think Coinbase is the best choice. Easy to start/ Trustworthy