For small amounts, also 24hr access.
There's a bunch of ATMs where I live and numerous times I've had problems with them stopping halfway through a transaction reporting some error. Here they often have somebody hanging around working for the ATM to chase off
rival traders sitting beside it offering a lower rate so I was able to fix the problem immediately but would be wary of any standalone ATM with a phone number that just led to a voicemail that's never checked.