I think the key to smooth reimbursement is meticulous documentation of everything! (Invoice, receipts, bank statements, credit card statements, etc.) It's not uncommon for me to have 4 different docs for a single expense item, but you'll get used to the bureaucratic ways of Chile soon enough. That said, I've been here 3 months, and so far have gotten most hardware purchases including a new Android phone reimbursed. One more thing to mention is that electronics here in Chile have like at least a 30% markup compared US prices, more for iPads and such. Just FYI.