Advantages: • Easy to use • Package consists of all 3 types of jumpers • Die Delivery is fast, good packaging • Completed 4 layout projects with his help. Cons: • CANNOT design more than one project at a time - another rainbow ribbon of each type would be nice, even if it would cost additional alterations • A few pieces broke/or the metal leg will come out, but not often enough to be a Big Problem • Some, if pulled out too far, protrude beyond the holes in the breadboard socket. Just pay attention to their length before placing an order and you will be fine. In general, they are acceptable and balanced in good and bad qualities. Would I buy them again? maybe a slightly larger pack with more male to male connectors if this was my first order for them but I would probably only buy the quantity I want to stock.