I bought my DVDs about 6 months ago. Unfortunately, ordering and recieving them was a hassle. When I recieved my three sets (Horizons, Journey into Imagination and World of Motion- the classics), I was shocked to find that the footage used was sometimes grainy or hard to see. Some of it was truly great, in fact, the videos reminded me of things that I forgot from that era of EPCOT Center.
The other thing that really got to me about this was the fact that only two weeks after I recieved my dvds, I found free online video tributes by our own Marni (known as Martin to others) that were in fact better (and less centered on the EAC's child- which in all three dvds threw temper tantrums- Yes, you see all of this).
I would recommend going to Geoffreynease.com and picking up Martin's tributes, because the quality is better for the actual ride-thrus and pavilions.
If you are looking for interviews from former Imagineers and famous Disney crew, then you might just want to spend the extra $15-35 for the dvds (I paid $35 for the three).
If you really like theme park videos, I also highly recommend Theme Park Review's dvds (I just ordered and recieved 6 of their amazing sets and I am getting ready to order two more)!
Hope that helps! :wave: