Fujitsu scansnap s1500m

I'm looking at purchasing the scansnap, but one of my main purposes is to scan the notes on my hundreds of index cards that I've used for teaching. I want to load them on my ipad and macbook pro. I've heard this machine does not handle anything other than standard weights of paper, and if it can't handle index cards I'll have to look elsewhere. Has anyone had any experience with this? I need someone to advise me before I purchase. Thanks