Fast and perfect. The glasses came way earlier than expected and the packaging was done with a lot of care. The U4 units pair with each other almost immediately so you dont have to wait long before its active. These are comfortable, stay in place and waterproof. It was great sport standing with a beer watching the amount of people losing their wellies and falling over in the mud. If my review of the Kingston HyperX Cloud Stinger has helped you make a decision about purchasing please give me a postive rating. Eagerly anticipating the upcoming riding season. They are a temporary solution that gets the job done. Total fail, dont bother Logitech clearly doesnt care at all about keeping this product working. For most people might be a complicated to use it just for the matter of installation.