Ok so my Macbook has the infamous crack on the palm rest, I've made a reservation at a genius bar. Could anyone tell me what has happened with their macbook when going to get this sorted? Will they have to take it away and if so how will i get back? I've heard that sometimes people have got their macs back with blank drives, I'm guessing it would be best to make a back up. Its quite an inconvenience for me not to have my Macbook during the week, is there anyway they can do this in one day?

Thanks
Thanks