This is the 5th installment to the Greek DVD collection (and the first time that a complete season was packaged together). Because it was a complete season it was marginally more expensive than some of the other sets (but not by much if you shop around a bit), however this also allowed you to follow all the story arcs in this season without the interruption that was present in others.
If you are a fan of the show I would recommend buying this and the other sets (because speaking as a slightly unwilling participant I actually enjoy watching this show whenever my wife has it on). If you are not a fan already, don't buy this set, but check out the first set and see what you think. That said the show is funny and the characters are interesting enough (a few you love and want to see where they end up; some you love to hate and want to see fall hard. Check it out, see if you like it and enjoy. : )