These connectors work well but have a tendency to pop out if you're not careful (this has more to do with the operator than the shields themselves). They also yield relatively well to deformations, although it is not yet clear whether this is a plus or a minus. On the plus side, this means you can move them around the hoop without taking them off completely. On the negative side, it seems like with enough tire changes they start to crack. In terms of value for money, they are definitely worth it!