The big problem with this machine is the Bluetooth/Wifi issue. I had a Mac Book from 2008 which connected perfectly to my wi-fi from sleep mode. Not so with this machine (the 2nd one as i sent back the first!) in that it takes ages to connect to Wifi from sleep mode. Apparently the problem is caused if Bluetooth is switched on. This is a major software flaw and Apple have been very slow to fix it. There is a shortcut to fix it by removing a Bluetooth file (which you can find online) but it's still quite slow to connect. The speed of connecting to Wifi has always been a key advantage of Apple over a PC. Amazing that such a basic issue has not been addressed yet. It will for sure make me think twice about buying another MacBook.