Like many others, I had originally purchased the Ultimate collections volumes 1 and 2. While the bonus features on those sets were nice, the picture quality wasn't as good as what CBS was finally able to deliver when they started releasing the Beverly Hillbillies complete seasons on dvd.
I'm glad that they finally went back to do season one. Like the Ultimate set, this one also allows you to watch the opening and closing with embedded commercials (cigarettes and breakfast cereals). My only beef is that the "play all" option from the menu plays the versions without the vintage ads.