Just reporting that I completed my update to 2013 Premium version of maps. The total cost was 50 euro for the FSC (about $67) and $18.99 for a 32GB flash drive I ordered from Amazon.com. Took a good 30 or 40 minutes to transfer the files from my computer to the flash drive and another 45 minutes to install the update. The map download by torrent took about an hour or less.
Definitely worth it considering BMW of Alexandria wanted over $600 to do it. They're such idiots.
BTW, if anyone in the local area wants to update their maps, PM me and I'll give you a hand with it. I've got the maps already. All you need is your FSC and I can help you get that for around $70.