When when Malatesta sat down with Microsoft last month for a chat about Windows phones and the Windows Marketplace for Mobile, we noted that you could "return" an app for a full refund within 24 hours of purchase. That's true, but there's a pretty big caveat: You can only do so once in a calendar month. From Microsoft's own mouth:

Customers are able to view purchase history on the Windows Marketplace for Mobile website. You will also be able to request a refund for credit card purchases once a month as long as it is within 24 hours of the purchase. For further credit card billing assistance, use the e-form to submit an issue to Microsoft Customer Service and Support.

That puts a kibosh on buying using the refund mechanism as a way to simply try apps. There are a few in the Marketplace with "lite" versions, but not all of them. And we can't do promo codes yet (though there's a good chance that'll start with Phase II, in which apps will be allowed to have secondary registration codes added).

And do note above the use of the phrase "request a refund." There's a reason it doesn't say "demand." Also, things get a little tricky if you have the Marketplace charges tacked on to your cell phone bill.

What about you guys out there? How's your experience with returns/billing been so far?