We have been shredding away bags of our unwanted receipts, bills, etc. and couldn't be happier with such a hard working and efficient shredder. I have also put UNOPENED credit card applications through it and it did the job great. I used to have to open the mail and take out the application portion to shred, but no longer!!! I just pop the whole thing in and it eats it up for me. I love this shredder! It even shreds credit cards and cd discs without any problem. The only drawback on this shredder is the fact that after continual use, it becomes overheated and you have to let the hardworking thing have a rest. Not unlike any of the rest of us, huh? Otherwise, this is a fabulous investment for the money and I give it a full 5 stars!!!