does anyone here have experience with mack warranties? (mackcam.com) im thinking about getting one after buying a sony dsc-w1 camera on ebay. im not sure i understand how it works, but this is what it seems like- you buy it after/when you buy a camera (any camera no matter which?) and then, they will repair it if anything goes wrong, but you have to mail it in to them. is this right? thanks!