What is the current situation of cash in Cuba? Last time I was there, there used to be convertible pesos (CUC). It was good to have some moneda nacional (MN) to buy for instance fruit in a small store or as a souvenir but with no practical use.
Also, there was some difference in exchange rate between a cadeca and the street, but in my opinion it was not worth the risk.
Now, I am going to a small city. Should I expect problems/delays/queues to get CUCs? What would be the exchange rate? Will there be a significant difference between, for instance, the hotel, the airport or a cadeca, and the street?
And lastly, will it be very difficult to change back the CUC to EUR? (I guess so)