My TD account does the same (though there is a minimum balance but it’s low). Super useful when traveling.With Schwab's checking account they reimburse all ATM fees and have no foreign transaction fees (and have no minimum balance and no monthly fees), so I generally just pull local currency out of an airport ATM once I arrive--airport ATMs pretty reliably accept US cards. The only downside is that Schwab doesn't have typical retail banking services (e.g. tellers for cash deposits, etc.) so I keep a second checking account for when I need someone local.
It's also nice to not have to worry when I need to use an ATM in Vegas with those exorbitant $9.99+ fees.