I Pre-Ordered on the Xbone and today's download was pretty smooth... I finished my Primary 360 and my secondary 360 this morning. Your Xbone and your 360 should have Pre-loaded all but the [i]last little smidgen[/i] of TTK with the 2.0 update. The Xbone should only take a minute to finish downloading. If it doesn't work try clearing the cache by turning it off, unplugging it for a minute, and restarting it. Then launch Destiny as normal and wait for the download key. On the 360 TTK isn't in the Marketplace. You have to have the 2.0 update installed (and Compatibility Packs 5 and up). Once you start go to the TTK Mission on Mars and select the middle option to purchase the TTK standalone key ($39.99)... it's only a tiny download too. IF you didn't do the 2.0 updates last week then this process could take HOURS (it took 12 hours for my Xbone to install 2.0).