I bought this shredder because I get a lot of credit card and loan offers in the mail. I was getting tired of having to open the envelopes and shred them a few pages at a time with my current 6 sheet shredder. I didn't even want to bother opening the envelopes before shredding. This shredder chewed through 6 months of thick envelopes and heavy card stock like a starving animal! I'm so glad I purchased the 24 sheet shredder instead of a lesser one. Since I will be using my shredder much less frequently than other users I'd say their testimonials will be more reliable in regards to long term performance. However, if you're looking for a shredder that can handle unopened envelopes, catalogues, and other junk mail, this one will do the job well!