Very easy to use and with outstanding quality of the conversion. But a bit expensive, so you better do some shopping on froogle, eBay, pricegrabber, etc. and find the best offered price for it.
I bought mine from
http://www.lightsparkle.com/product_page.php?product_id=69 using the 15% discount it gives you upon registration and out there are probably quite a few similar deals.