This is probably my favorite sitcom of all time. Great writing, memorable characters and just all around different from what everyone else was doing at the time, and what very few have done since.
I love this collectible set because not only will I get to enjoy all of those laughs for years to come, but I have a convenient "portable" version of the entire series now sitting on my shelf and taking up about a quarter of the space my old series DVDs used to.
I got this when it was on sale, but even at regular price it is a great value. Nine seasons of a show is going to cost you a lot more, typically. And given the quality of this show, they are practically giving it away at that price.
Buy it. You'll love it.