FYI, I’ve made some test visa charges today and they are pending at ARS 398/1 GBP. This is not as good as the blue rate of ARS 355/1 USD I got at my hotel in Mendoza. However, If this holds, it will make more sense to charge my hotel to visa as I will save the VAT and the overall cost will be less. Just not sure the charges will clear before I check out and an official rate conversion would be very unfavorable.