My 3D disc set came the other day and got a chance to watch it over the weekend. I hadn't seen it in the theaters, and only the 3D disc so far, so my impressions are limited until I watch it again in 2D one of these days, too. Although first time thru it didn't grab me the way some of my favorite films have, but sometimes I need to watch again and let a film grow on me.
As far as the US and Tintin goes, I never saw him before a friend who had an extensive collection introduced me to the English version books, and that was 20 years ago. I enjoyed reading them all. I doubt many of my friends knew of Tintin before this film came out and many still don't. Can't say I've run across much Tintin in the meantime until I saw the ads for the theatrical release, but knew I'd go ahead and buy it blind, pretty much a no-brainer for me.
I thought overall the pq and sound was quite good, although I also at one point had to look at what the avr was indicating, whether a 7 channel format or not. I experienced a few 3D anomalies (I have no idea what the term would be) but don't know if they were deliberate, either as they kind of reminded me of the blue streaks JJ Abrams put in Star Trek and Super 8. I'll watch again and make some notes, right now I couldn't tell you exactly what the scenes were or if that perhaps changing settings could resolve it, and there were only maybe three times I noticed anything.
Tintin I'd rate a 7.5 for now overall.