I had money from a house sale in Schwab for a while and mostly used it to buy treasuries and a little bit of BRK stock. Didn't have any issues. Also when I had to wire out a large amount of money to pay for the new house, I had no issues wiring the money. I did call ahead to make sure there would be no issues.

The one common complaint is the lack of interest Schwab pays on cash. Personally I usually just roll cash into treasuries so it isn't a big deal for me but I believe they don't pay much compared to Fidelity/Vanguard.

I have 3 accounts with TD that have not yet been move. Apparently if you use ThinkOrSwim software, your account is likely to be one of the last ones to move. My accounts were originally set up with ThinkOrSwim and Scottrade. Never opened an account with TD although I did get use to it.