I have loved this episode since I was a child, it is probably my favourite, but it is only on re-viewing it as an adult that I have realized just how multi-layered it is.  It is less humorous than most of the other episodes, and on reflection it supports a story line unique in its maturity as the central theme is essentially about love.  The protagonist is an ex-boyfriend of Firestar's who is exacting revenge, and so for our heroine the battle is fought not just on a physical level but on an emotional one as well.  Credit to the writers for formulating this idea, when quite honestly any super villain could have been used to break into the X-Mansion and wreak havoc.  The emotional journey undertaken by Firestar commences with denial, develops into uncertainty, yet by the episode's end she has finally resolved her feelings for Nathan and in a sense has made peace.  It is interesting that she turns to Peter and not Bobby for support in this episode.  It is interesting to hear Peter's poignant view of love.  It is wonderful that the X-Men are featured and given quality air time.  It is also great that for the most part comic book characterizations are adhered to, examples being, Storms evident claustrophobia and the hint of the close relationship shared between Sprite and Colossus. I am probably over analyzing this far too much, it is after all a cartoon, but then again it's not 'just a cartoon'...it's a FANTASTIC cartoon and it's insights like these into the characters lives that help make it so.  For me it is just another example of why the Spider-Friends leaves other cartoon shows far behind.

  

I don't know how Jon feels about this one but I have to disagree with Caroline. This is one I never saw as a child but later in the early 1990s when I bought the video at a department store. It was quite a disappointment as I was expecting something more along the lines of how I remembered the show growing up which of course consisted of the excellent first season stories. Now I know I often bash the whole "Firestar seems far too strong a character to be having all these flaky romances" but even putting that aside I think the characterization and story line in general is very poor. Again I think the attempt to capture who the X-Men are is really lost on this one. I think this episode probably sunk any chances of the X-Men having a Saturday Morning cartoon the following season. I did like the beginning when Spidey got to test out the Danger Room. The end was nice too when Firestar revealed to Spidey that she had completely lost any love she may have had for Nathan. Sadly though that leaves 20 minutes worth of story in between. Aw...it's just a cartoon anyhow right?

    

Yep.  "Just a cartoon".  That sums it up nicely IMO.  Sorry Caroline.  I can't believe how different all of our opinions are on this one.  I loved it too as a child but it hasn't held up well for me.  I totally flipped out when I first saw this just because it had the X-Men in it.  ["NIGHTCRAWLER! YES!" (cue annoying Macaulay Culkin arm movement)]  Looking back at it now...eh.  Nothing exciting.  The 'Maze of Madness' seems pointless as it would've been a lot more fun to have the teams fight their way through the Danger Room (controlled by Cyberiad).  What the HECK was Thunderbird doing in this?  He was dead in the comic books! (And where's Wolverine, you chickens?)  Worst of all though the story gets way too serious. Typical 80s Saturday morning stuff.