One of the best things about this knife is the price. It's right around $10 on Amazon. With this price it makes you not worry so much about potentially ruining it. When it came time to remove the carpet from a spare bedroom, my actual carpet knife was at the office so I used the 511 for the job. Boy did it handle the task with ease and of course, if I did happen to destroy the knife it was no big deal.
After it was all over, the 511 no longer passes the paper test, but only by a little. A quick sharpen should get it back on track for camping season, which starts in a couple of weeks - watch out sticks!
Disclosure - The links to the knife go to Amazon where I purchased it. By clicking it and buying the knife, I may get compensated from Amazon with no additional cost to you.