[Eric72]

I'm a bit late to the party; however, figured I'd weigh in.

I briefly tried Card Savers a few years ago. I found them to be too flimsy, they don't lay entirely flat, and they put slightly more pressure on the corners than the rest of the card. So, I went back to the storage method I've used since the '80s:

Unless they're in a binder, each card gets a penny sleeve. If the card is worth more than a few dollars, it then goes into a toploader.