I have HSBC across HK, USA, and Jersey but I will be charged the 50 GBP Premier underfunding fee soon.
HSBC HK, Expat and US have more or less the same requirement of about USD 100k for Premier.
I use HSBC to diversify the geopolitical risk (by investing in ETFs on the LSE through Expat in Jersey), and pay my credit card in the US (which provides a lot of benefits). I use Interactive Brokers (in Hong Kong) to invest in US T-bills. I like having my assets in both Jersey and Hong Kong to mitigate the geopolitical risk.
To keep the relationship balance, the products offered by HSBC Expat are high in fees, and the term deposits have bad interest rates compared to T-bill (at least 1% below T-bills) so it would still be cheaper for me to keep investing in T bills thru Interactive Brokers and pay the GBP 50 underfunding fee than letting HSBC invest and having that fee waived.
HSBC USA could be good for US ETF investments but as a non US person I should never invest through this.
What would you do? Sometimes I am thinking of making things more simple (close my HSBC USA account, my US credit card, HSBC Expat account), just use one Hong Kong bank account and invest everything through IB. Less headaches or things to think about.