I'm one of those annoying people that asks questions about movies during the movies to whoever I'm with even if they are as clueless as me. Also one of those people that will sit and google the plot of the movie while I'm watching it so I know the outcome. I'm the same with books I nearly always read the last page first because who wants to read a sad book.
With going to the cinema to see this movie it meant that I didn't get to google the ending and find out everything in the first few minutes of the start.
I won't talk about the plot of the movie and what happens incase you want to watch it and aren't like me wanting to know everything start away.
If you aren't aware of the comics and up to date with the movies some parts will go over your head a little bit for a while. Though saying this I really enjoyed this and continues on well from the last film.
This films centres around Tony Stark accidentally creating robots to kill the human race which isn't exactly how it happens in the comics but close enough for a novice like me to come with understanding. The avengers then have to destroy Ultron to save the human race, there is no longer S.H.I.E.L.D. but from the movies its pretty much the same as its just the avengers take over those roles i.e. Stark plays for massive building and equipment.
Overall it's an enjoyable movie if you like action movies if not you might want to give it a miss as thats pretty much the whole movie.