I sent myself $399 USD by WU yesterday and netted $344.
The fee was $24.99 (6.236%).
I made the transfer yesterday morning using my Schwab debit card and the funds were deposited into my Santander Rio savings account just before 6 pm.
I immediately paid off my Santander Rio credit card in full (about $125.000) pesos. The payment was credited to my Visa account before 9 am this morning (faster than ever before), adding that amount to my availble credit to make purchases that I will pay for a month from now.
I went shopping on Mercado Libre this morning, noticing a number of price increases in the 5%-10% range that happened just since yesterday.