OK so the IOS7 file is 1gb, after I downloaded it all you need to do is fire up itunes press Shift and click Update. It took about 10 minutes to install it but now it works perfectly. No bugs so far and the apps I tested work the same as before. All in all I'm happy with it at a first glance.
awesome feel excited but I will wait until they release the ios7 free updates on itunes this coming sept 18