I found this to be a thoroughly middling experience.  It's a neat couple of episodes absolutely worth watching for any Doctor Who fan, but that is because it does a lot to establish certain aspects of the TARDIS very early on in the franchise's history.  It's neat seeing such an early take on the Doctor's vessel and even just an early bottle episode.  All of this makes for a pretty fun experience overall, but when you get down to the actual execution, it is a bit underwhelming.  Ian tries to kill everyone and acts "weird" - which basically translates to a blank and wide eyed expression - and I kind of feel nothing.  If you aren't interested in the aspects of this show's own history, Edge of Destruction doesn't really offer a lot on its own.  Still, the cast is always entertaining and it does leave me feeling I could follow this TARDIS crew into just about any kind of adventure and have a decent time of it.