First I must say having been around for the original Star Lord and Guardians I went into the theater skeptical of what I would encounter. I can honestly say that these new Guardians and Star Lord in particular are handled rather well.
I can also say that the next link in this Disney/Marvel series of movies did with excitement and action what other movies do as an intro or narrative. First, we are introduced to the literal expanded universe in which Marvel has placed its characters within. Alien races are the core elements of this movie as it carries the overall story arc forward.
The action is quick and continual. If it look like it is going to get boring, it makes you laugh and then you are in the action once again. It is well worth the time and money. Oh and by the way, plan on sitting through all the credits to see a post-credit clip to the movie.

Base Story: 5 swords out of 5 swords
Acting: 5 swords out of 5
Special effects: 5 of 5 swords
Overall: 5 swords out of 5 swords.