I've never used them in the 20 years I've lived here. The ATM's work with debit/credit cards drawn on US or UK accounts, as do the shops. Most internet savvy can use PayPal, although they have some retarded rules about what the money is used for. Within the family we use a "Hawala" method and keep all currency local. There have been the odd occasion where people expect cashiers checks/cheques for certain types of transactions, but most businesses are fine with regular checks, and can seek recourse through the state's attorney if they bounce. International bank transfers are too complicated for me to care to repeat, unless it was a very large transfer.
WU would be useful if you need to get money to someone in an emergency, and is used by people who don't have bank accounts to cash checks, although WalMart would cash them too, and cheaper.
Perhaps there is a method where you can have someone pick up a pre-paid/empty debit card at WalMart, and have you fill it remotely. Or a quick google suggests they can do it all in-house.
http://www.walmart.com/cp/Online-Money-Transfers/1089406While I'm not a huge fan of WalMart, they are prolific. ie I could direct you to several from here, but I'd have to go figure out where there was a WU outlet.
