Though I'm not an avid TV watcher, Lance Mannion's occassional posts on Mad Men inspired me to download all four seasons. We're up to the beginning of Season 4. This might be the best thing I've ever seen on televison, but this isn't a review of Mad Men. It's a mini review of iTunes TV.
I've been downloading the show from another site. That site is missing Season 4 episode 8, so I turned to iTunes for the missing episode. Downloading was extremely slow and the download repeatedly derailed due to errors of some kind. Not only that, I selected the non-HD version for downloading, but iTunes began to download both the HD and the regular versions at the same time. Based on the progress of the download, I'd estimate a 4-5 hour process for both versions together. When I realized what was happening, I was able to stop the HD download. After several misfires, the non-HD version downloaded in about 80 minutes. I don't know yet if iTunes billed me for both versions or only the cheaper one I selected.
They should add streaming video as an option. The current delivery system is a pain in the ass. I can't even imagine trying to download the entire series at iTunes.
This was my first attempt to download video from iTunes. Maybe mine was an abberant first experience, but, as of right now, I don't see myself returning for seconds unless I absolutely must.