I first caught 'Elvis The Final Chapter' when it was broadcast on the VH1 music channel back in 2001, and eventually picked it up on disc when it came out.
It has been a long time since I last played it but I recall it does feature a few somewhat more graphic details than some documentaries that cover the subject. The interviews with both Joe Esposito and Shiela Ryan are of interest.
However, the production could certainly have done without the (thankfully infrequent) reenactment segments which to me only served to detract from the actual content.
Worth checking out on the whole I guess.