I have had this item for months and its ability to punch through normal lightweight paper began to degrade rather quickly. In addition, the guide used to make sure the punch was lined up wasn't 100%, so I had a lot of crooked pages. Loading the comb was always hit or miss, but once it was on, the pages went on the combs rather smoothly. It doesn't work on your larger combs (1"+) and the prongs that is used to keep the comb in place breaks easily (I had to return my first one because several of the teeth had breaks at the bottom). The kicker was when some paper got stuck in the punch mechanism, completely locked it up and I had to rip the paper out of the machine to release it.
Overall, it's was good while it lasted.