I picked "Very Satisfied", since there's always room for improvement.
I don't play 4E, so I don't use the compendium or the character creator (or any of the other tools). I just get it for
Dragon and
Dungeon. Even just for the magazines it's well worth it. If an adventure has a good plot and interesting locales/monsters/npc's, then it's well worth it to convert (and converting really isn't that hard). Especially Ari's adventures. And even though the crunch in
Dragon is 4E specific, I still find the fluff useful and inspiring (and again, the crunch isn't that hard to convert).
My only sticking point originally, was the lack of full page art and maps, and keyed and unkeyed versions. Once they began providing them, I signed up. Can't beat the price for the amount of material provided.
Now, like I said in the thread about the new survey, if DDI included support for previous editions (conversion info for
Dragon articles and
Dungeon adventures, character creator support for all editions, all editions compendiums, ability to modify character creator for houserules, and all useable with the future virtual gametable and social networking applications) I'd be willing to pay $20/month for it.