For most of my thoughts on the release of this show please see my review of the first set. My score takes into account the DVD's lack of special features and visual quality, but the rest of this written review is for the episodes contained herein.
The first set concluded with the third episode of season 2 ("Whatever it Takes") and volume 2 picks up from there. Season 2, like season 1, had episodes that all ran together though here the gap in time between episodes is not always clear. Connecting them all together is the absence of Professor Xavier and clips of he and Magneto's trials in The Savage Land are found in each episode before the storyline comes to a conclusion in the two-part "Reunion." The villain Mr. Sinister also appears throughout as it becomes clear he has a heavy influence on the happenings of season 2.
Sinister was a relatively new villain at the time of this show's creation and season 2 is pretty topical in that regard. Omega Red is featured here and he was almost brand new at the time of the episode's creation. If that displeased some longtime fans, they were rewarded with the five part Phoenix Saga that concludes the set. The Phoenix Saga here obviously needed to be reworked (after all, a completely different team of X-Men existed at the time in the comics) but it is mostly faithful. Some other comic book plots are carried over such as The Plague and Wolverine's past dealings with Department H but altered to better fit the animated series continuity.
An interesting trend was also started where a new character each week got his or her own episode. For characters like Rogue and Gambit, an origin story was presented where their past caught up to them (as opposed to having a flashback episode). For a character like Beast, the episode "Beauty and the Beast" merely serves to give us a better understanding of that character's relationship with the world and his teammates. They're all nicely done and are effectively dramatic (especially the Rogue and Beast ones). Wolverine is featured quite heavily ( as always) with him playing a significant role in just about every episode. For someone who likes Wolverine, even I can get a bit annoyed but at the same time no character feels too neglected save for maybe Jean and Cyclops, but both end up being huge players in The Phoenix Saga so all is forgiven. And while I enjoy some episodes more than others, there really isn't a bad one here. If I had to pick a least favorite it would be "Mojovision" as I've never cared for the Mojo character, but that episode is a bit slapstick and is a nice break from the heavy serious tone of the other episodes. My favorite is probably "Beauty and the Beast" as it's an easy episode to relate to and puts the show's civil right's issues on stage in a tasteful way.
It should also be noted, the show sees a change in visual quality with the "Out of the Past" episodes. The colors are richer and more black outlines are used giving the show a more "toon" quality. Whether you like the style is a matter of opinion, but the animation itself is of higher quality. This may have been due to the fact that these two episodes originally aired in prime time and were used to hype the upcoming Phoenix Saga. The Phoenix Saga episodes seemed to tone down this new look, but the animation remained improved over the first two seasons.
Needless to say, if you bought volume 1 it makes no sense to not get volume 2. The quality of the episodes is just as good and if you can get past the lack of any kind of bells and whistles with these releases this volume is a good buy. If you haven't purchased volume 1 yet, I recommend getting them both at the same time through Amazon as you end up paying less than a dollar per episode (if you go with super saver shipping). This show is still the best animated series from Marvel and deserves a spot in any comic book fan's library. Now, please Disney, give us the rest of the episodes!