Just finished the campaign, and it left mostly positive impressions on me.
I never had any previous exposure to the setting, nor from the pen&paper nor from the previous videogames, and i liked it more than i expected, because it avoids that inconclusive "let's be random!" pitfall that some mixed sf/fantasy settings have. In the game it's presented with enough detail to capture the imagination but also blank enough to be fit for any kind of story, definitely a good foundation on which a mod community can thrive. On a side note: I liked how the virtual-world was represented in the gameplay as a split battlefield instead of just the obligatory "and now we show off how much we like Tron"-themed level.
I also loved the execution: the polished clean look, good music, and decent writing. I definitely enjoyed the text-is-the-focus approach to it. I realized how much i was missing those little body language quips that peppered dialogues in those old games, so much charm.
What i didn't enjoy is... the tablet-ness of it. I couldn't kick out the lingering feeling i was playing a great tablet game on the wrong hardware. From the saving feature (obviously designed to be balanced by the standby button), the sparse interface, the bite-sized story-chunks with no backtracking... it all would have made more sense played on a tablet.
Overall, i liked the game and it felt good being a backer. Looking forward to the Berlin campaign.