I tried out Delta Studio last night DTW-XNA. I spent about 30 minutes troubleshooting on a live chat, so I'll pass along what I discovered.

If you are logged into your Gogo account on your iOS device, you will NOT have the "Entertainment" option from the Gogo homepage and cannot choose on demand content. Once you sign out, the menu shows the "Entertainment" and "My Library" options. The live chat agent was not aware of this and is passing the info along, so hopefully it's fixed soon.

Once I figured that out, I was able to add content to my library but it would not play on my iPhone. I could choose the content from Delta Studio within the Fly Delta app and it would launch the Gogo video plugin, but it would not go past that screen. I rebooted my phone twice and it still wouldn't work.

On my laptop, after I downloaded the browser plugin (took about 15 seconds for the 8 MB file) and restarted the browser, the content played fine and I didn't notice any lagging during the few minutes I let the video run. I was able to skip ahead in the movie without any problems.

I had to validate my seat in F by entering my name and seat number. I played around with entering a few different things and can confirm that it will only validate your seat when you enter your name exactly as it appears on your ticket and your correct seat number. Once that was done, all content was available for no charge.

Once added to your library, the content is valid for 24 hours. I suppose that means that if you're in Y on another flight within the next 24 hours, you'll still have access to the premium content in your library for no charge since thankfully it doesn't ask you to validate every time you begin playback.

I was curious what would happen if I tried to access the movies in my library once I was on the ground, so I pulled up Delta Studio on my iPhone and got the Introduction screen like I had gotten before boarding the flight. When I got home, I changed the name of my wireless network to "gogoinflight" and was able to pull up my library on my iPhone as if I was on the plane. However when I tried to play a video, I got a message that said "Playback for this title is only available in the air." Looks like they figured that part out.

They obviously still have some kinks to work out on the iOS side, but everything did seem to working fine on my laptop.