It's okay but does not live up to decent expectations.

Rating: 6/10 (2 May 2015)

~~~!CONTAIN SPOILERS!~~~
Just to clarify that I'm not a comic fan by any means and I'm judging the movie strictly by what I believe should be done with the execution of the movie, and not with the storyline itself.
The movie starts off pretty good and then it shoots downhill pretty fast and stays stagnant for a good while. The middle of the movie is a bit slow and sometimes a bit boring. There's just a bunch of talking, most of which are actually pointless and not needed may I add, as well as quirky jokes that are sometimes weird and awkward. Overall I had about three good laughs throughout the whole movie (182 minuntes).
Aside from it not being as funny and a bit destructive in trying too hard to be funny, the action is slightly disappointing. One of the things I looked forward to the most was to see the Hulk in action. The Hulk almost got no screen time besides fighting Starks... his ally. You never see any Hulk vs. the enemy and you surely won't get any satisfying "that's why you don't f*ck with the Hulk" moments. Over half of the movie the hulk is in a tough love relationship with Black Widow and how they want to run off together... while the remainder of the time he is just jumping around in the background. The best thing shown about he Hulk was him jumping on to an aircraft and throwing Ultron off... which isn't shown either.
The movie did a good job at giving the rest of the Avengers screen time. Unfortunately for the green guy, it's mainly Bruce Banner this time around.
Ultron is also a dumb and poorly executed villain. Quite honestly... Quicksilver and Scarlet Witch is the true 'villain.' They pretty much did most of the work for Ultron in the beginning... AND they were pretty much the reason the Avengers won as well after they switched sides... The movie is pretty much carried and made possible only by Quicksilver and Scarlet Witch combined with the screen time of Ultron and the Avengers to give it the illusion that it's more about them.
Half way through the movie he was creating his 'perfect' body; combining his AI with a real body and the powerful gem taken from Loki's scepter. He put up two guards to protect him during the process. Two. Long story short the Avengers were able to take it from Ultron so he doesn't complete his plan. Later when he tried to kill billions of people by causing a giant explosion by dropping an entire city from the sky he had thousands of robot guards to help him this time. At least he learned. But he should have known this from the start with how smart he should have been.
I could write this out for hours but in summary it's a good but not great movie. There are too many random scenes with random lines that are completely unnecessary. Not enough Hulk time (excluding fighting Iron Man, really?). Ultron is a smart but dumb robot and is not really capable without the early help of Quicksilver and Scarlet, 'mutants' if you didn't know.
Pros: - Some good action. - A few good jokes.
Cons: - Weird romance between Bruce and Black Widow. - Not enough Hulk time. - Quirky jokes and lines that doesn't work. - Ultron is pathetic and doesn't really do much. - Scarlet Witch and Quicksilver made the whole movie possible. They 'caused' the problem, switched sides half way, and then help 'solve' the problem.