The product was delivered quickly, packaging was a bit jaded. The combs were not aligned, I had to do it myself. The use is very simple (pull the joystick in one direction and then in the other). Regarding perforation, it is possible to pierce 7-8 sheets at a time for approximately holes clean and free. Regarding the binding, it is possible to connect up to 200-250 pages if one is patient (put on about 20 pages with 20 pages), but it's not beyond. Anyway, the value is good. After a few minutes of grip, it is easy to link records for family use (especially when you are a student). This requires some patience, but the result can be very correct. Anyway, I recommend this product because it is much more efficient than some perforelieurs that can display 3 or 4 times that price!