I shredded a shopping bag full of documents with this product. I didn't need to remove staples. I think inserting 8 pages at a time would be a bit too much, but it had no problem with 4-5 pages at a time. I haven't tried credit cards yet.With a bagful of documents to shred, I soon realized the basket fills up pretty quick (say after 30-40 pages?) Because I was oblivious to it at first, I once or twice clogged it so bad, I needed to spend a long time unclogging it with a tweezer and a metal dental pick. Once I learned to pay attention to the basket capacity, I only had to dump it before it filled up. Overall, I am reasonably satisfied with the product.