Cambio at the airport

As I prepare to come down after a 2 1/2 yr. hiatus a few questions on the ATM's in ZIH.
1. The Airport HSBC use to be fine, I did remember that it took 6 digit pin vs. my 4 digit pin, I think I had to add 2 zeros at the end of the pin for it to work (plz correct me if that is not the case).
FYI: Also anyone that is with Keybank from the US and you have a World Debit ATM card the bank will refund most if not all fees as to the transaction, but if you get a bad "day rate exchange" then its on the customer.
2. Second question is there any preferred ATM that you would recommend as to better exchange rate and lowered machine fees in town or the Airport.
Thanks!

PS any new restaurants that is off the charts as to food quality, etc. would love to hear from you..