I can second this. I had some technical issues with Fidelity[0] and Vanguard[1] and both support groups were absolutely useless. I switched to Schwab and it has been a breeze. Everything so far has been really smooth and the little bit I've had to interact with support they were on the ball.

[0]Transfers kept failing for no clear reason. [1]My account got into some sort of state where if I tried to login it said my account didn't exist, but when I tried to create a new one it said I already had an account.