My 8 year old daughter and I saw this film together as part of a night out. This brief review is specifically written from that perspective.
See it. Your child will be thoroughly entertained, as one of the lead characters is a young girl. It's in 3D. It's Disney. She'll love it.
And you won't be tortured. The hero is of course the Ralph of the title, and as Disney characters go, is someone a lot of Dads can relate to or at least be amused by. The animation is pretty cool (especially in 3D), there are references to some old video games from our generation (Qbert, Frogger et al), and the story isn't as lame as most of the others I've had to sit through.
And Sarah Silverman's voice, even as little girl, is quite enjoyable ;-)
Dad's: if you're looking for a way to bond and entertain your 6-10 year old daughter, this is money well spent.