RE:opinion - Trading accounti m with td waterhouse for over 15 years and i will say that the only time i was disappointed was at the start and middle of the pandemic... it was difficult to get through... back to normal now with very good service...
be careful about leaving or transfering your accounts as some company have pretty hefty fees for transfer... if you are planning on transferring on all four accounts you should talk to a td rep they might be willing to reimburse you those closing fees
good luck on your search