I'm all up to date with Seasons 1-6 now. There's a lot of good watchin' on those DVDs... decent special features and all. My ony problem with the special features is that you really need to be a fan to watch them. I tried watching them with Jen, who hadn't seen any Red Dwarf before and found that a lot of those stupid little specials in the first few DVDs were littered with scenes and clips that hadn't happened yet chronologically. It kinda ruins some of the better scenes and jokes.
Other than that, they're pretty good. Some of the special features are lame, but that's to be expected.
Three more episodes to go on the VI disc for me! Then it's the VERY patient wait until Seasons VII and VIII are released.