This is a terrific temptation, especially if you don't already own any of the series DVDs. After all, how tempting is it to have 5 seasons worth of episodes instantly available! So much better than buying individual episodes and cheaper than buying each year separately. It is an incredibly long stretch between seasons, and a 5-year set provides a lot of viewing!
The downside, and the reason for 4 stars, is that at this point, it would be better to buy the series in Blu-Ray, as the HD format wars are over, and with the final season coming, it seems sort of weird to buy such a "so close but yet so far" set. Still, the Blu-Ray point is stronger. I think I would regret not having an HD version in a year or two. Come on, Eileen - where's the Blu-Ray version!?