I'm wondering about the poor customer service comments about Vanguard. They have answered every question I've had and made transfer of funds go smoothly. Almost a decade ago DW and I had no money with Vanguard. We were desperately looking for a brokerage account that would let DW set up a custodial account for her father who had been diagnosed with Alzheimers. He had a hodge podge of small accounts at high fee locations or at banks. Vanguard let us set up a custodial account and it functioned without problems the rest of his life. When the great split came when his estate was settled. DW moved half of the account into SILs account and half into ours. Quick and easy.
Because of their help through this period, it seemed a no brainer to consolidate our accounts there since I had been buying Vanguard ETFs through my ETrade account. We quickly became Flagship which I realize gets a higher level of support but I really haven't noticed a difference.