And if so, how do you like it?
Wikipedia has a definition from the UK perspective but the idea is the same everywhere: reduced service and cost. Just knock everything down to strictly transactional services, and only online.
They're also called "neobanks" and "fintech" (financial technology) banks ... this is
not Venmo or some other person-to-person money transfer. These use debit cards instead of checks written.
I'm not so much looking for a discussion of why not to use one of these
but will describe them as I understand them to be. I'm aware you can't write checks or go into a bank branch "for any reason, including ones I can't think of."
But in looking around I noticed these entities suffer from an identity problem. Many are marketed/advertised/explained away as "pay day apps" for one salient feature they're known for: The ability to make direct deposits available 2 days before payday. The idea is you can spend some or all the money and on the real payday, the balance of what's leftover posts "for real."
This is not a trick and not a loan: All major banks receive your paycheck and hold on to it, only posting it on payday to "ensure" it posts on the correct day. For whatever reason paying you "early" is both potentially confusing, "wrong" and whatever else. (It's not as if companies block banks from releasing too early.) Or perhaps they can legally earn interest on your paycheck, I don't know.
At any rate the "payday" feature isn't why I'm interested; I really am looking for no or low fees for another account that has a separate purpose from our main checking account. And no, there are no --- zero --- credit unions here. Signing up for one out of my area is akin to just going with one of these, but at a lower cost probably.
How they appear to work is they use a "real" partnering bank and act as a front, very much like
how a MVNO operates ... a thing we've talked about for years here.
Much of this circles back to branding and marketing. Verizon wants to position themselves as a premium service, yet has no problem selling you service from Visible instead. It's dumb. Similarly, there's no reason why Citi or Chase or BofA couldn't do this (and they might, for all I know) except that they don't.