When it hangs, how long do you let it sit there? When I downloaded the Combo package, the first day it was out which is always bad, the time remaining kept bouncing around from under an hour to as much as 10 hours. I just let it sit until it downloaded the file. I think it ended up taking just over an hour. But it did download.
The App Store issue, the 102 error could be a refusal on the part of the server for some reason, system load, etc., which will eventually cause a time-out error message. In theory, we all know how much that is worth, the system should tell you why connection has been refused. Doesn't always work out, though.
Unless the Combo download is stalling for a really long time, I would let it work at downloading for a while, as long as you have time to let it go.
There once was an ability to pause a download and resume later...see if you can do that if it is taking too long.