I don't believe vmmxx is fdic insured. I was using ING for a long time and have fond memories of it but they were acquired by capital one. I was with capital one for years but a few things made me want to start looking for a new account. I have been doing a lot of research into which bank to switch to.
So far I am trying Marcus, Citizens Access, and CFG Bank. American Express seemed good too and also Alliant but I don't need so many.
FYI a few banks have a low limit on external transfers. You can get around this by initiating the transfer from an external account.
There were MANY banks with good rates but a lot of really bad reviews. Vio, Brio, Varo, Customers, etc. Wondering if anyone here has tried those and had a good experience.