how good are these? i want a kb and mouse for use when im at my desk at home, but i want wireless and more importantly BT wireless because as you'll all be aware of USB ports are at a premium. i do have a hub yes, but also id like to be able to atleast take the mouse with me when i go out. so i would prefer not to have to use any usb ports. ive read a few things about the wireless mighty mouse..mainly that it is unreliable and not built particularly well. stories of battery bay doors falling off, dropped connections, non-functioning scroll ball etc same with the keyboard with the added bonus that it is naturally hard to keep clean because its white. again batt bay doors coming off, unexpected total failures etc. theres not many options out there is there really....so apple is almost the only choice. logitech MX5000 laser desktop is also completely BT as well but isnt designed for mac.... i know it will work, but the question is how well?