The ToC is on the WotC site, I think. They are all adventures already published for 4E. I've used pieces of a couple in my campaign, but I have never run one of these whole cloth. If you have DDI, no reason to get this at all that I can think of.
Treebore, I wouldn't recommend it. There is only 1 strong adventure out of the bunch (Stormtower). There is one as part of the adventure path, which is hard to run as a standalone. I played through the Icy Spire and it's just ok, nothing special.
I would suggest getting 1 month of DDI and just downloading all the adventures that have been released. Mouseferatu's Last Breath of Ashenport is really cool, which was left out for some reason.