Light compared to the previous one I had and I thought it would be reliable. However, within a month it does not leave the sheet perforated evenly. Therefore, my work is not getting done. I will make a return request in the new year and we'll see.
I am returning to add that I returned it to be checked or repaired. The store told me that it was misused (?) and that it is only for home use - one would think we have never used a binding machine before or that we need it once a year (!). The person in charge, Mr. Michalis, assured me that it would eventually be sent back to me repaired. However, I received it exactly as I sent it without any apparent repair being done. Therefore, it is for short-term use. It goes without saying that I will not order from this particular store again.

The device does its job very well, however it lacks durability in its construction. Specifically, I don't know how long it will withstand drilling through sheets as it seems to struggle quite a bit.