Chuck was, especially in the first couple seasons, an awesome show. It was a mix of action, comedy and drama. It was sometimes totally preposterous and over-the-top, but it never took itself too seriously. For people who have a hard time suspending their disbelief, this is not a show for you. The entire premise of a guy getting government secrets beamed into his head, and then having a CIA and NSA handler accompany him through weekly adventures is not even remotely realistic. If you can get beyond that however and just be entertained by a funny, well-acted show you should give this a shot.
Chuck was really only 4 seasons long. The first was cut short by the writer's strike and the 5th was only a 13 episode season. It was a show that was always teetering on the brink of cancellation. but managed to survive. The die hard fans may remember that it came out the same year as the Bionic Woman reboot which NBC promoted constantly. This is the show that should have been pushed, and if it was it may have had better ratings at the outset. But even without the massive promotional machine it managed to hang around. While having Yvonne Strahovski in various stages of undress from week-to-week probably helped that, it was the overall quality of the series that made it what it was.
It was another show that had an ensemble cast of relative unknowns, which ended up working well. Everyone from the main characters to the Buy More ancillary characters did a great job in their roles. The series gave all the characters a chance to have a story, and really evolve. There were also a lot of nerdy pop culture references throughout the course of the show. There were references to Star Wars, Die Hard, Groundhog Day, Back to the Future, Dune, James Bond, The Terminator, and on and on.
Obviously there is a massive amount of subjectivity in liking or disliking a show, especially one like this. Die hard fans of the show probably already own the seasons, some may be holding out for a box set for the series and some may just be checking it out. For those in the last category I would definitely recommend it given the proviso I made earlier about suspension of disbelief. There are cheaper options than this particular packaging though so you probably want to do some price shopping.