Purchasing a Commando Commission gives you peace of mind. Your photographer (or videographer) WILL show up and deliver solid work. You don't have to worry about the "free friend" flaking out on you, working with the wrong tools, or not realizing how many batteries a wedding day requires. Your commission will be completed by a pro who KNOWS weddings.
As a second point of support, all files will be backed up and stored for one full year (remember, you go home with one SD card, and your artist will leave with a duplicate card), so if the worst should occur, you still have a backup.
You will also retain the right to request edits later. Editing fees are $30 per image or $2000 for the entire gallery, and video edits are $1750 for a highlight and $600 for a ceremony + speeches + first dance edit ($2000 for both together).