I read the negative reviews but ordered anyway because of the low price. I really dislike the long jumper wires that typically come with breadboards. These are so awesome coming from those. I've been using and reusing wires from this kit on my breadboards for a couple of weeks and I really don't have any complaints. I use tweezers when installing them and there is no problem inserting them in my breadboards without deforming. If I was using my huge ham-hands instead of the tweezers, I can see there might be a problem with the insertion and manipulation of the wires. They adjust well too. I keep a pair of strippers near by when I'm working so I can cut and strip them to the exact length I want if one of the stock sizes isn't to my liking. Recommended for anyone that work with breadboard projects.