I was in a training programm in Arena, Bangalore.
From what I observerd the instructors are mostly students who passed out from arena. Obviously they arent experts in that software / field. As a result the input we get from them not going to help when working on live projects.
The only advantage that I see is the exposure to MAC. Which is rare in Bangalore. Other than that theres nothing different about ARENA.
Id Suggest that you first talk to the counsellors and find out what exactly they are offering and how different it is from the the other training centers. It would be best if you know your instructor (whether he/she is an expert and has the background to teach). I realize that its a far call. Otherwise its not worth the time or money if you dont get a good instructor.