Despite being the "Boy Scout" of the Marvel Universe (in comics and movies), Steve/ Captain America shows he really is a super soldier. The speed and intentional ferocity that Cap hits opponents with was reminiscient of the early books by Jack Kirby who drew the character with a reckless, no holding back abandon. There is Cap on a motorcycle versus a SHIELD attack plane, Cap versus a round from a grenade launcher, Cap versus an elevator full of trained and armed operatives, Cap versus a missile, Cap free-falling into the ocean from a plane, Cap versus a ship full of pirates, Cap versus Batroc and of course, Cap versus Winter Soldier. Throw in several instances of Cap versus gravity and you appreciate the durability, smarts and courage Cap has. The movie also showcases just how important the shield is to Captain America.
Arnim Zola's return is a clever nod to the design of the comics character, and the movie is full of "easter eggs": mentions of Tony Stark, Iron Man, Howard Stark, and Stark Industries run through the movie. One agent mentions Stephen Strange. Nick Fury makes a passing reference to Dr. Bruce Banner. The old SHIELD logo and acronym appear in the movie, and the Avengers get a mention as well.
Black Widow has become Cap's right-hand partner at the start of the film. The two are an interesting dynamic with Cap trying to be true to his ideals and do what is right in this new world, and Natasha trying to find her real identity after so many years of having to make herself into whoever she has to be. There is an underlying spark of potential romance, but... Sharon Carter is in the movie but is really underutilized. She gets a passing conversation with the Captain and starts a Mexican standoff, but really her introduction in this film just sets the stage for future appearances.
Robert Redford nearly steals the show and gets much more screen time than I was expecting. His role as SHIELD's diplomatic secretary and head of the council that oversees SHIELD (and Nick Fury) becomes central to the action of the movie.
There is plenty of violent action with hand-to-hand fighting and explosions but very little blood, very little in the way of harsh language, no sex or nudity. Instead there is a solid storyline that moves things along, has plenty of surprises and is very satisfying in the end. See it, It is well worth the price of a movie ticket!