I had this issue when originally downloading the game during beta. I live in New Mexico, and the fastest internet I can get here is 128Kb. Every time there was the smallest hickup my download would have to start over from scratch. And some of the hickups were caused by the launcher logging me out before the download was done, and not a result of my internet. A download that should have taken me 2 days ended up taking 5. It was a very frustrating experience to say the least.