I signed up with Goldman Crypto Trading (allmaxgoldmancryptotradingvip.com) after hearing about them at a conference and the first red flag was the aggressive account manager who would not stop calling. After depositing, the promised support vanished. Withdrawals are delayed with endless excuses. I have reported them to the regulator.
Pros: Dedicated account manager|API access|Good analytical tools
Cons: Currency conversion fee exists|Cannot customize dashboard fully