I have all the season and solo releases. The solo releases are pretty much watch once, and then store. The "To Be Continued" stingers at the end (especially BOBW, of course) are still worth the inconvenience of getting up to change discs. Unification (and Chain of Command) are completely useless for viewing outside of the bonus features and the initial novelty, since the parts are on the same disc. The bonus features are well worth it, though. The more commentaries and documentaries, the better. Plus certain episodes deserve the extra treatment, such as BOBW, Redemption, Unification (and be extension Sarek), Chain of Command, and likely All Good Things.