April and I went to see it yesterday. All that was available during the time we had to see it was the 3D show, and surprisingly the 3D was non-distracting. It felt more like you were "in" the film and it certainly was very sharp & clear. April has gotten headaches whenever she's seen 3D films in the past, but this one didn't bother her at all.
Regarding the film...wow. It was simply perfect. The acting, the effects, the drama, the fighting...wow. I wouldn't change a thing, really. April was mad when I commented on ScarJo's rear filling the screen for one shot, but then she got Evans in a tank top with all his ripped-ness later so I told her to shut it. .
Just a great time at the theater, and since the trailers were TNMT, X-Men, ASM2 and Guardians I really felt lucky. This is a golden age for us comic book fans, and I'm loving every minute of my childhood dreams of real-life superheroes playing out on the big screen.
Peace,
Chip