Skype in the classroom - Good Enough?

We recently had a very sucesfull class usage of Skype.  A professor brought in a guest speaker.  This speaker would not have been part of the class if they had to travel to campus.  The Skype conference went flawlessly, but not without effort.  We did a few trial calls and our network group graciously took the time to dedicate bandwidth to this call.  The professor was happy, and word spread, soon we had another request for using Skype, this time for some interviews with off campus folks.  This time the calls were not quite as flawless.  Because several people were being called, we could not dedicate bandwidth to each connection. The result was that the video froze, audio fell out, all the things that can happen with this type of call.  They decided to drop the skype connection and just go to the conference phone.  In a classroom, a conference phone would not have been an option.  It left me a little less excited about using skype in the classroom.  No matter how prepared I make a faculty member for the idea that skype could fail, if it actually fails it is still a problem.  After all, the faculty member has planned part (or all) of their class around this, so my inability to give them any re-assurance that Skype will work, leads me to recommend they not use it.  As much effort as we all put in to make this sucesfull, it just is not possible to do this work for every possible instance of when and where people may want to use skype.  In my opinion, in the classroom, Skype is just not good enough.