Much better than the lower profile ones on the market. I do about 15 pages at a time easily. More than 20 and you have to put your weight behind it. After about a year's heavy use (40 000 pages) it seems the blades dull a bit. You need to press more firmly to punch the hole way through or you get "hanging chads". Cut nicely when it was new.
I have only had this for a week but it has worked great in my classroom. I put holes in all the papers I copy so the students can keep them in their binders.