Hmm, while I like the design for Spidey, especially how they've actually incorporated his occasionally-they-shrink-or-grow-when-we-need-him-to-emote-strongly eyes from the comics, it does look like they haven't quite finished the CGI on him just yet. He just looks a bit too polished and cartoony, like they haven't quite added all the detail yet.
Also, that scene where Ant-Man runs through Iron Man's arm, you look at the thing he jumps off and its clearly one of Hawkeye's arrows. Can we just take a minute to appreciathe that we're getting a big screen live action version of this scene:
http://i.imgur.com/0neAHGT.gifv